diff --git a/.gitignore b/.gitignore
index f36f431cd3d5..cfeb426ab62a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
 .tags*
 /.idea/
 /browser/resources/brave_extension/
+/components/brave_webtorrent/extension/out/
 /dist/
 /out/
 /vendor/requests
@@ -39,4 +40,4 @@ npm-debug.log
 *~
 CMakeLists.txt
 cmake-build-debug/
-coverage/
\ No newline at end of file
+coverage/
diff --git a/brave_paks.gni b/brave_paks.gni
index e61df6352083..1f38f84d1071 100644
--- a/brave_paks.gni
+++ b/brave_paks.gni
@@ -58,11 +58,13 @@ template("brave_extra_paks") {
       "$root_gen_dir/brave/brave_unscaled_resources.pak",
       "$root_gen_dir/components/brave_components_resources.pak",
       "$target_gen_dir/browser/resources/brave_extension.pak",
+      "$target_gen_dir/components/brave_webtorrent/brave_webtorrent_resources.pak",
     ]
 
     deps = [
       "//brave/app:brave_generated_resources_grit",
       "//brave/app/theme:brave_unscaled_resources",
+      "//brave/components/brave_webtorrent:resources",
       "//brave/components/resources:brave_components_resources_grit",
       "//brave/browser/resources:brave_extension_grit",
       "//brave/common/extensions/api"
diff --git a/browser/extensions/BUILD.gn b/browser/extensions/BUILD.gn
index ac72d42fdaf2..ccb4f97a984a 100644
--- a/browser/extensions/BUILD.gn
+++ b/browser/extensions/BUILD.gn
@@ -24,6 +24,7 @@ source_set("extensions") {
 
   deps = [
     "//brave/browser/resources:brave_extension_grit",
+    "//brave/components/brave_webtorrent:resources",
     "//chrome/browser",
     "//content/public/browser",
     "//extensions/browser",
diff --git a/browser/extensions/brave_component_extension_resource_manager.cc b/browser/extensions/brave_component_extension_resource_manager.cc
index 31feda2fdd18..e5db061e6d0c 100644
--- a/browser/extensions/brave_component_extension_resource_manager.cc
+++ b/browser/extensions/brave_component_extension_resource_manager.cc
@@ -5,6 +5,7 @@
 #include "brave/browser/extensions/brave_component_extension_resource_manager.h"
 
 #include "brave/browser/resources/grit/brave_extension_resources_map.h"
+#include "brave/components/brave_webtorrent/grit/brave_webtorrent_resources_map.h"
 
 namespace extensions {
 
@@ -13,6 +14,10 @@ BraveComponentExtensionResourceManager() {
   AddComponentResourceEntries(
       kBraveExtension,
       kBraveExtensionSize);
+
+  AddComponentResourceEntries(
+      kBraveWebtorrentResources,
+      kBraveWebtorrentResourcesSize);
 }
 
 BraveComponentExtensionResourceManager::
diff --git a/browser/extensions/brave_component_loader.cc b/browser/extensions/brave_component_loader.cc
index b1966688c122..e2af51c77783 100644
--- a/browser/extensions/brave_component_loader.cc
+++ b/browser/extensions/brave_component_loader.cc
@@ -6,6 +6,7 @@
 
 #include "base/command_line.h"
 #include "brave/common/brave_switches.h"
+#include "brave/components/brave_webtorrent/grit/brave_webtorrent_resources.h"
 #include "components/grit/brave_components_resources.h"
 
 namespace extensions {
@@ -33,6 +34,11 @@ void BraveComponentLoader::AddDefaultComponentExtensions(
         brave_extension_path.Append(FILE_PATH_LITERAL("brave_extension"));
     Add(IDR_BRAVE_EXTENSON, brave_extension_path);
   }
+
+  base::FilePath brave_webtorrent_path(FILE_PATH_LITERAL(""));
+  brave_webtorrent_path =
+    brave_webtorrent_path.Append(FILE_PATH_LITERAL("brave_webtorrent"));
+  Add(IDR_BRAVE_WEBTORRENT, brave_webtorrent_path);
 }
 
 }  // namespace extensions
diff --git a/browser/extensions/brave_extension_provider.cc b/browser/extensions/brave_extension_provider.cc
index 4426f00f0e6e..561140721eff 100644
--- a/browser/extensions/brave_extension_provider.cc
+++ b/browser/extensions/brave_extension_provider.cc
@@ -22,6 +22,7 @@ bool IsWhitelisted(const extensions::Extension* extension) {
   }
   static std::vector<std::string> whitelist({
     brave_extension_id,
+    brave_webtorrent_extension_id,
     pdfjs_extension_id,
     // 1Password
     "aomjjhallfgjeglblehebfpbcfeobpgk",
@@ -126,7 +127,8 @@ bool BraveExtensionProvider::UserMayLoad(const Extension* extension,
 
 bool BraveExtensionProvider::MustRemainInstalled(const Extension* extension,
                                                  base::string16* error) const {
-  return extension->id() == brave_extension_id;
+  return extension->id() == brave_extension_id ||
+    extension->id() == brave_webtorrent_extension_id;
 }
 
 }  // namespace extensions
diff --git a/browser/resources/resource_ids b/browser/resources/resource_ids
index 66a5407f764b..800eab522142 100644
--- a/browser/resources/resource_ids
+++ b/browser/resources/resource_ids
@@ -21,4 +21,5 @@
   "brave/app/theme/brave_unscaled_resources.grd": {
     "includes": [36500],
   },
+  # brave webtorrent 37500
 }
diff --git a/chromium_src/chrome/browser/extensions/component_extensions_whitelist/whitelist.cc b/chromium_src/chrome/browser/extensions/component_extensions_whitelist/whitelist.cc
new file mode 100644
index 000000000000..463bc4f46e40
--- /dev/null
+++ b/chromium_src/chrome/browser/extensions/component_extensions_whitelist/whitelist.cc
@@ -0,0 +1,41 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#define IsComponentExtensionWhitelisted IsComponentExtensionWhitelisted_ChromiumImpl
+#include "../../../../../../chrome/browser/extensions/component_extensions_whitelist/whitelist.cc"
+#undef IsComponentExtensionWhitelisted
+
+#include "brave/common/extensions/extension_constants.h"
+#include "components/grit/brave_components_resources.h"
+#include "brave/components/brave_webtorrent/grit/brave_webtorrent_resources.h"
+
+namespace extensions {
+
+  bool IsComponentExtensionWhitelisted(const std::string& extension_id) {
+    const char* const kAllowed[] = {
+      brave_extension_id,
+      brave_webtorrent_extension_id
+    };
+
+    for (size_t i = 0; i < arraysize(kAllowed); ++i) {
+      if (extension_id == kAllowed[i])
+        return true;
+    }
+
+    return IsComponentExtensionWhitelisted_ChromiumImpl(extension_id);
+  }
+
+  bool IsComponentExtensionWhitelisted(int manifest_resource_id) {
+    switch (manifest_resource_id) {
+      // Please keep the list in alphabetical order.
+      case IDR_BRAVE_EXTENSON:
+      case IDR_BRAVE_WEBTORRENT:
+        return true;
+    }
+
+    return IsComponentExtensionWhitelisted_ChromiumImpl(manifest_resource_id);
+  }
+
+}  // namespace extensions
+
diff --git a/chromium_src/net/url_request/url_request_context_builder.cc b/chromium_src/net/url_request/url_request_context_builder.cc
new file mode 100644
index 000000000000..e4291591b04e
--- /dev/null
+++ b/chromium_src/net/url_request/url_request_context_builder.cc
@@ -0,0 +1,6 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "brave/net/url_request/magnet_protocol_handler.h"
+#include "../../../../net/url_request/url_request_context_builder.cc"
diff --git a/common/extensions/api/BUILD.gn b/common/extensions/api/BUILD.gn
index 312d2fda535d..d32f5769b4e5 100644
--- a/common/extensions/api/BUILD.gn
+++ b/common/extensions/api/BUILD.gn
@@ -26,6 +26,7 @@ json_features("manifest_features") {
   sources = [
     "//chrome/common/extensions/api/_manifest_features.json",
     "//extensions/common/api/_manifest_features.json",
+    "_manifest_features.json",
   ]
 }
 
diff --git a/common/extensions/api/_api_features.json b/common/extensions/api/_api_features.json
index 124160009744..0c4f663ed00a 100644
--- a/common/extensions/api/_api_features.json
+++ b/common/extensions/api/_api_features.json
@@ -48,5 +48,20 @@
     "matches": [
       "chrome://newtab/*"
     ]
-  }]
+  }],
+  "sockets.tcp": {
+    "dependencies": ["manifest:sockets"],
+    "contexts": ["blessed_extension"],
+    "whitelist": ["3D9518A72EB02667A773B69DBA9E72E0F4A37423"]
+  },
+  "sockets.tcpServer": {
+    "dependencies": ["manifest:sockets"],
+    "contexts": ["blessed_extension"],
+    "whitelist": ["3D9518A72EB02667A773B69DBA9E72E0F4A37423"]
+  },
+  "sockets.udp": {
+    "dependencies": ["manifest:sockets"],
+    "contexts": ["blessed_extension"],
+    "whitelist": ["3D9518A72EB02667A773B69DBA9E72E0F4A37423"]
+  }
 }
diff --git a/common/extensions/api/_manifest_features.json b/common/extensions/api/_manifest_features.json
new file mode 100644
index 000000000000..fcacdb730e04
--- /dev/null
+++ b/common/extensions/api/_manifest_features.json
@@ -0,0 +1,11 @@
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+{
+  "sockets": {
+    "channel": "stable",
+    "extension_types": ["extension", "platform_app"],
+    "whitelist": ["3D9518A72EB02667A773B69DBA9E72E0F4A37423"]
+  }
+}
diff --git a/common/extensions/extension_constants.cc b/common/extensions/extension_constants.cc
index 33e9ea11b9db..ce9458ed3e70 100644
--- a/common/extensions/extension_constants.cc
+++ b/common/extensions/extension_constants.cc
@@ -5,5 +5,6 @@
 #include "brave/common/extensions/extension_constants.h"
 
 const char brave_extension_id[] = "mnojpmjdmbbfmejpflffifhffcmidifd";
+const char brave_webtorrent_extension_id[] = "lgjmpdmojkpocjcopdikifhejkkjglho";
 const char pdfjs_extension_id[] = "oemmndcbldboiebfnladdacbdfmadadm";
 const char widevine_extension_id[] = "oimompecagnajdejgnnjijobebaeigek";
diff --git a/common/extensions/extension_constants.h b/common/extensions/extension_constants.h
index 672959180d94..613d1c55361a 100644
--- a/common/extensions/extension_constants.h
+++ b/common/extensions/extension_constants.h
@@ -3,5 +3,6 @@
  * You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 extern const char brave_extension_id[];
+extern const char brave_webtorrent_extension_id[];
 extern const char pdfjs_extension_id[];
 extern const char widevine_extension_id[];
diff --git a/components/brave_adblock_ui/BUILD.gn b/components/brave_adblock_ui/BUILD.gn
index c07456599c83..473a5f1eb58e 100644
--- a/components/brave_adblock_ui/BUILD.gn
+++ b/components/brave_adblock_ui/BUILD.gn
@@ -14,5 +14,5 @@ transpile_web_ui("brave_adblock_ui") {
     "reducers/adblock_reducer.ts",
   ]
 
-  bundle_name = "brave_adblock.bundle.js"
+  bundle_names = ["brave_adblock.bundle.js"]
 }
diff --git a/components/brave_new_tab_ui/BUILD.gn b/components/brave_new_tab_ui/BUILD.gn
index 1a3a4777269f..2082bd1460c8 100644
--- a/components/brave_new_tab_ui/BUILD.gn
+++ b/components/brave_new_tab_ui/BUILD.gn
@@ -18,5 +18,6 @@ transpile_web_ui("brave_new_tab_ui") {
     "reducers/index.ts",
     "reducers/new_tab_reducer.tsx",
   ]
-  bundle_name = "brave_new_tab.bundle.js"
+
+  bundle_names = ["brave_new_tab.bundle.js"]
 }
diff --git a/components/brave_rewards_ui/BUILD.gn b/components/brave_rewards_ui/BUILD.gn
index 137fc8c2ea15..d31682c9adc0 100644
--- a/components/brave_rewards_ui/BUILD.gn
+++ b/components/brave_rewards_ui/BUILD.gn
@@ -13,5 +13,5 @@ transpile_web_ui("brave_rewards_ui") {
     "reducers/rewards_reducer.ts",
   ]
 
-  bundle_name = "brave_rewards.bundle.js"
+  bundle_names = ["brave_rewards.bundle.js"]
 }
diff --git a/components/brave_webtorrent/BUILD.gn b/components/brave_webtorrent/BUILD.gn
new file mode 100644
index 000000000000..c77c3e34b1f4
--- /dev/null
+++ b/components/brave_webtorrent/BUILD.gn
@@ -0,0 +1,18 @@
+import("//tools/grit/grit_rule.gni")
+import("//tools/grit/repack.gni")
+
+grit("resources") {
+  source = "resources.grd"
+  outputs = [
+    "grit/brave_webtorrent_resources_map.cc",
+    "grit/brave_webtorrent_resources_map.h",
+    "grit/brave_webtorrent_resources.h",
+    "brave_webtorrent_resources.pak",
+  ]
+
+  deps = [
+    "//brave/components/brave_webtorrent/extension:brave_webtorrent"
+  ]
+
+  resource_ids = ""
+}
diff --git a/components/brave_webtorrent/extension/BUILD.gn b/components/brave_webtorrent/extension/BUILD.gn
new file mode 100644
index 000000000000..fa55d5032a94
--- /dev/null
+++ b/components/brave_webtorrent/extension/BUILD.gn
@@ -0,0 +1,43 @@
+import("//brave/components/common/typescript.gni")
+
+transpile_web_ui("brave_webtorrent") {
+  inputs = [
+    "background.ts",
+    "brave_webtorrent.html",
+    "brave_webtorrent.tsx",
+    "actions/tab_actions.ts",
+    "actions/webtorrent_actions.ts",
+    "actions/window_actions.ts",
+    "background/store.ts",
+    "background/webtorrent.ts",
+    "background/actions/tabActions.ts",
+    "background/actions/webtorrentActions.ts",
+    "background/actions/windowActions.ts",
+    "background/events/tabsEvents.ts",
+    "background/events/torrentEvents.ts",
+    "background/events/webtorrentEvents.ts",
+    "background/events/windowsEvents.ts",
+    "background/reducers/index.ts",
+    "background/reducers/webtorrent_reducer.ts",
+    "components/app.tsx",
+    "components/mediaViewer.tsx",
+    "components/torrentFileList.tsx",
+    "components/torrentStatus.tsx",
+    "components/torrentViewer.tsx",
+    "components/torrentViewerFooter.tsx",
+    "components/torrentViewerHeader.tsx",
+    "constants/tab_types.ts",
+    "constants/theme.ts",
+    "constants/webtorrentState.ts",
+    "constants/webtorrent_types.ts",
+    "constants/window_types.ts"
+  ]
+
+  bundle_names = [
+    "brave_webtorrent.bundle.js",
+    "brave_webtorrent_background.bundle.js"
+  ]
+
+  output_dir =
+    "$root_gen_dir/../../../brave/components/brave_webtorrent/extension/out"
+}
diff --git a/components/brave_webtorrent/extension/actions/tab_actions.ts b/components/brave_webtorrent/extension/actions/tab_actions.ts
new file mode 100644
index 000000000000..d0e946fc2b1f
--- /dev/null
+++ b/components/brave_webtorrent/extension/actions/tab_actions.ts
@@ -0,0 +1,25 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { action } from 'typesafe-actions'
+
+// Constants
+import { types } from '../constants/tab_types'
+
+export const tabCreated = (tab: chrome.tabs.Tab) => action(types.TAB_CREATED, {
+  tab
+})
+
+export const tabUpdated = (tabId: number, changeInfo: chrome.tabs.TabChangeInfo, tab: chrome.tabs.Tab) =>
+  action(types.TAB_UPDATED, {
+    tabId, changeInfo, tab
+  })
+
+export const tabRemoved = (tabId: number) => action(types.TAB_REMOVED, {
+  tabId
+})
+
+export const activeTabChanged = (tabId: number, windowId: number) => action(types.ACTIVE_TAB_CHANGED, {
+  tabId, windowId
+})
diff --git a/components/brave_webtorrent/extension/actions/webtorrent_actions.ts b/components/brave_webtorrent/extension/actions/webtorrent_actions.ts
new file mode 100644
index 000000000000..d2f558515c45
--- /dev/null
+++ b/components/brave_webtorrent/extension/actions/webtorrent_actions.ts
@@ -0,0 +1,16 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { action } from 'typesafe-actions'
+import { Torrent } from 'webtorrent'
+
+// Constants
+import { types } from '../constants/webtorrent_types'
+
+export const progressUpdated = (torrent: Torrent) => action(types.WEBTORRENT_PROGRESS_UPDATED, { torrent })
+export const infoUpdated = (torrent: Torrent) => action(types.WEBTORRENT_INFO_UPDATED, { torrent })
+export const serverUpdated = (torrent: Torrent, serverURL: string) =>
+  action(types.WEBTORRENT_SERVER_UPDATED, { torrent, serverURL })
+export const startTorrent = (torrentId: string, tabId: number) => action(types.WEBTORRENT_START_TORRENT, { torrentId, tabId })
+export const stopDownload = (tabId: number) => action(types.WEBTORRENT_STOP_DOWNLOAD, { tabId })
diff --git a/components/brave_webtorrent/extension/actions/window_actions.ts b/components/brave_webtorrent/extension/actions/window_actions.ts
new file mode 100644
index 000000000000..b54a4fed7326
--- /dev/null
+++ b/components/brave_webtorrent/extension/actions/window_actions.ts
@@ -0,0 +1,20 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { action } from 'typesafe-actions'
+
+// Constants
+import { types } from '../constants/window_types'
+
+export const windowCreated = (window: chrome.windows.Window) => action(types.WINDOW_CREATED, {
+  window
+})
+
+export const windowRemoved = (windowId: number) => action(types.WINDOW_REMOVED, {
+  windowId
+})
+
+export const windowFocusChanged = (windowId: number) => action(types.WINDOW_FOCUS_CHANGED, {
+  windowId
+})
diff --git a/components/brave_webtorrent/extension/background.ts b/components/brave_webtorrent/extension/background.ts
new file mode 100644
index 000000000000..3d4da61e3ef1
--- /dev/null
+++ b/components/brave_webtorrent/extension/background.ts
@@ -0,0 +1,10 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { init } from './background/webtorrent'
+init()
+
+require('./background/store')
+require('./background/events/tabsEvents')
+require('./background/events/windowsEvents')
diff --git a/components/brave_webtorrent/extension/background/actions/tabActions.ts b/components/brave_webtorrent/extension/background/actions/tabActions.ts
new file mode 100644
index 000000000000..751bf84a80f2
--- /dev/null
+++ b/components/brave_webtorrent/extension/background/actions/tabActions.ts
@@ -0,0 +1,8 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { bindActionCreators } from 'redux'
+import store from '../store'
+import * as tabActions from '../../actions/tab_actions'
+export default bindActionCreators(tabActions, store.dispatch)
diff --git a/components/brave_webtorrent/extension/background/actions/webtorrentActions.ts b/components/brave_webtorrent/extension/background/actions/webtorrentActions.ts
new file mode 100644
index 000000000000..b7eef7ab074d
--- /dev/null
+++ b/components/brave_webtorrent/extension/background/actions/webtorrentActions.ts
@@ -0,0 +1,8 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { bindActionCreators } from 'redux'
+import store from '../store'
+import * as webtorrentActions from '../../actions/webtorrent_actions'
+export default bindActionCreators(webtorrentActions, store.dispatch)
diff --git a/components/brave_webtorrent/extension/background/actions/windowActions.ts b/components/brave_webtorrent/extension/background/actions/windowActions.ts
new file mode 100644
index 000000000000..948d7c928798
--- /dev/null
+++ b/components/brave_webtorrent/extension/background/actions/windowActions.ts
@@ -0,0 +1,8 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { bindActionCreators } from 'redux'
+import store from '../store'
+import * as windowActions from '../../actions/window_actions'
+export default bindActionCreators(windowActions, store.dispatch)
diff --git a/components/brave_webtorrent/extension/background/events/tabsEvents.ts b/components/brave_webtorrent/extension/background/events/tabsEvents.ts
new file mode 100644
index 000000000000..e6c07b834112
--- /dev/null
+++ b/components/brave_webtorrent/extension/background/events/tabsEvents.ts
@@ -0,0 +1,21 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import tabActions from '../actions/tabActions'
+
+chrome.tabs.onCreated.addListener((tab: chrome.tabs.Tab) => {
+  tabActions.tabCreated(tab)
+})
+
+chrome.tabs.onUpdated.addListener((tabId: number, changeInfo: chrome.tabs.TabChangeInfo, tab: chrome.tabs.Tab) => {
+  tabActions.tabUpdated(tabId, changeInfo, tab)
+})
+
+chrome.tabs.onRemoved.addListener((tabId: number, removeInfo: chrome.tabs.TabRemoveInfo) => {
+  tabActions.tabRemoved(tabId)
+})
+
+chrome.tabs.onActivated.addListener((activeInfo: chrome.tabs.TabActiveInfo) => {
+  tabActions.activeTabChanged(activeInfo.tabId, activeInfo.windowId)
+})
diff --git a/components/brave_webtorrent/extension/background/events/torrentEvents.ts b/components/brave_webtorrent/extension/background/events/torrentEvents.ts
new file mode 100644
index 000000000000..99f955310d6f
--- /dev/null
+++ b/components/brave_webtorrent/extension/background/events/torrentEvents.ts
@@ -0,0 +1,41 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { Torrent } from 'webtorrent'
+import * as throttle from 'throttleit'
+
+import webtorrentActions from '../actions/webtorrentActions'
+import { createServer } from '../webtorrent'
+
+export const addTorrentEvents = (torrent: Torrent) => {
+  torrent.on('done', () => {
+    webtorrentActions.progressUpdated(torrent)
+  })
+  torrent.on('infoHash', () => {
+    console.log('infoHash event')
+    webtorrentActions.infoUpdated(torrent)
+  })
+  torrent.on('metadata', () => {
+    console.log('metadata event')
+    webtorrentActions.infoUpdated(torrent)
+  })
+  torrent.on('download', throttle((bytes: number) => {
+    webtorrentActions.progressUpdated(torrent)
+  }, 1000))
+  torrent.on('upload', throttle((bytes: number) => {
+    webtorrentActions.progressUpdated(torrent)
+  }, 1000))
+  torrent.on('ready', () => {
+    console.log('ready', torrent)
+    createServer(torrent, (serverURL: string) => {
+      webtorrentActions.serverUpdated(torrent, serverURL)
+    })
+  })
+  torrent.on('warning', (e: Error | string) => {
+    console.log('warning: ', torrent, e)
+  })
+  torrent.on('error', (e: Error | string) => {
+    console.log('error: ', torrent, e)
+  })
+}
diff --git a/components/brave_webtorrent/extension/background/events/webtorrentEvents.ts b/components/brave_webtorrent/extension/background/events/webtorrentEvents.ts
new file mode 100644
index 000000000000..3c6f7e774144
--- /dev/null
+++ b/components/brave_webtorrent/extension/background/events/webtorrentEvents.ts
@@ -0,0 +1,11 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { Instance } from 'webtorrent'
+
+export const addWebtorrentEvents = (webtorrent: Instance) => {
+  webtorrent.on('error', (e: Error | string) => {
+    console.log('WebTorrent error: ', e)
+  })
+}
diff --git a/components/brave_webtorrent/extension/background/events/windowsEvents.ts b/components/brave_webtorrent/extension/background/events/windowsEvents.ts
new file mode 100644
index 000000000000..9a8a328f390c
--- /dev/null
+++ b/components/brave_webtorrent/extension/background/events/windowsEvents.ts
@@ -0,0 +1,17 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import windowActions from '../actions/windowActions'
+
+chrome.windows.onFocusChanged.addListener((windowId: number) => {
+  windowActions.windowFocusChanged(windowId)
+})
+
+chrome.windows.onCreated.addListener((window: chrome.windows.Window) => {
+  windowActions.windowCreated(window)
+})
+
+chrome.windows.onRemoved.addListener((windowId: number) => {
+  windowActions.windowRemoved(windowId)
+})
diff --git a/components/brave_webtorrent/extension/background/reducers/index.ts b/components/brave_webtorrent/extension/background/reducers/index.ts
new file mode 100644
index 000000000000..2a5fb58e099b
--- /dev/null
+++ b/components/brave_webtorrent/extension/background/reducers/index.ts
@@ -0,0 +1,13 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { combineReducers } from 'redux'
+
+// Utils
+import webtorrentReducer from './webtorrent_reducer'
+import { ApplicationState } from '../../constants/webtorrentState'
+
+export default combineReducers<ApplicationState>({
+  torrentsData: webtorrentReducer
+})
diff --git a/components/brave_webtorrent/extension/background/reducers/webtorrent_reducer.ts b/components/brave_webtorrent/extension/background/reducers/webtorrent_reducer.ts
new file mode 100644
index 000000000000..29bc23161029
--- /dev/null
+++ b/components/brave_webtorrent/extension/background/reducers/webtorrent_reducer.ts
@@ -0,0 +1,222 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import * as ParseTorrent from 'parse-torrent'
+import { Torrent } from 'webtorrent'
+
+// Constants
+import * as tabTypes from '../../constants/tab_types'
+import * as windowTypes from '../../constants/window_types'
+import * as torrentTypes from '../../constants/webtorrent_types'
+import { File, TorrentState, TorrentsState } from '../../constants/webtorrentState'
+
+// Utils
+import { addTorrent, delTorrent, findTorrent } from '../webtorrent'
+
+const isTorrentPage = (url: URL) => {
+  const fullpath = url.origin + url.pathname
+  return fullpath === chrome.runtime.getURL('extension/brave_webtorrent.html')
+}
+
+const focusedWindowChanged = (windowId: number, state: TorrentsState) => {
+  return { ...state, currentWindowId: windowId }
+}
+
+const windowRemoved = (windowId: number, state: TorrentsState) => {
+  const { activeTabIds } = state
+  delete activeTabIds[windowId]
+  return { ...state, activeTabIds }
+}
+
+const activeTabChanged = (tabId: number, windowId: number, state: TorrentsState) => {
+  const { activeTabIds } = state
+  activeTabIds[windowId] = tabId
+  return { ...state, activeTabIds }
+}
+
+const tabUpdated = (tabId: number, url: string, state: TorrentsState) => {
+  const { torrentStateMap, torrentObjMap } = state
+  const origTorrentState: TorrentState = torrentStateMap[tabId]
+  const origInfoHash = origTorrentState ? origTorrentState.infoHash : undefined
+  let newTorrentState
+  let newInfoHash
+
+  // delete old torrent state
+  delete torrentStateMap[tabId] // delete old torrent state
+
+  // create new torrent state
+  const parsedURL = new window.URL(url)
+  if (isTorrentPage(parsedURL)) { // parse torrent
+    const torrentId = decodeURIComponent(parsedURL.search.substring(1))
+    try {
+      const { name, infoHash, ix } = ParseTorrent(torrentId)
+      newInfoHash = infoHash
+      newTorrentState = { tabId, torrentId, name, infoHash, ix }
+    } catch (error) {
+      newTorrentState = { tabId, torrentId, errorMsg: error.message }
+    }
+  }
+
+  // unsubscribe old torrent if not the same
+  const isSameTorrent = newInfoHash && origInfoHash === newInfoHash
+  if (origInfoHash && torrentObjMap[origInfoHash] && !isSameTorrent) {
+    torrentObjMap[origInfoHash].tabClients.delete(tabId)
+    if (!torrentObjMap[origInfoHash].tabClients.size) {
+      delete torrentObjMap[origInfoHash]
+      delTorrent(origInfoHash)
+    }
+  }
+
+  // save new torrent state and subscribe directly if torrent already existed
+  if (newTorrentState) {
+    torrentStateMap[tabId] = newTorrentState
+    if (newInfoHash && torrentObjMap[newInfoHash]) {
+      torrentObjMap[newInfoHash].tabClients.add(tabId)
+    }
+  }
+
+  return { ...state, torrentStateMap, torrentObjMap }
+}
+
+const tabRemoved = (tabId: number, state: TorrentsState) => {
+  const { torrentStateMap, torrentObjMap } = state
+  const torrentState = torrentStateMap[tabId]
+  if (torrentState) {
+    const infoHash = torrentState.infoHash
+    if (infoHash && torrentObjMap[infoHash]) { // unsubscribe
+      torrentObjMap[infoHash].tabClients.delete(tabId)
+      if (!torrentObjMap[infoHash].tabClients.size) {
+        delete torrentObjMap[infoHash]
+        delTorrent(infoHash)
+      }
+    }
+    delete torrentStateMap[tabId]
+  }
+
+  return { ...state, torrentStateMap, torrentObjMap }
+}
+
+const startTorrent = (torrentId: string, tabId: number, state: TorrentsState) => {
+  const { torrentStateMap, torrentObjMap } = state
+  const torrentState = torrentStateMap[tabId]
+
+  if (torrentState && torrentState.infoHash &&
+    !findTorrent(torrentState.infoHash)) {
+    addTorrent(torrentId) // objectMap will be updated when info event is emitted
+  }
+
+  return { ...state, torrentObjMap }
+}
+
+const stopDownload = (tabId: number, state: TorrentsState) => {
+  const { torrentStateMap, torrentObjMap } = state
+  const infoHash = torrentStateMap[tabId].infoHash
+
+  if (infoHash && torrentObjMap[infoHash]) {
+    delete torrentObjMap[infoHash]
+    delTorrent(infoHash)
+  }
+
+  return { ...state, torrentStateMap, torrentObjMap }
+}
+
+const updateProgress = (state: TorrentsState, torrent: Torrent) => {
+  const { torrentObjMap } = state
+  // don't add a new entry since the download might be stopped already
+  if (!torrentObjMap[torrent.infoHash]) {
+    return state
+  }
+
+  const { downloaded, uploaded, downloadSpeed, uploadSpeed, progress, ratio,
+    numPeers, timeRemaining } = torrent
+  torrentObjMap[torrent.infoHash] = { ...torrentObjMap[torrent.infoHash],
+    downloaded, uploaded, downloadSpeed, uploadSpeed, progress, ratio,
+    numPeers, timeRemaining }
+
+  return { ...state, torrentObjMap }
+}
+
+const updateInfo = (state: TorrentsState, torrent: Torrent) => {
+  const { torrentStateMap, torrentObjMap } = state
+  const { downloaded, uploaded, downloadSpeed, uploadSpeed, progress, ratio,
+    numPeers, timeRemaining, infoHash } = torrent
+  let length: number = 0
+  const files: File[] = torrent.files.map((file) => {
+    length += file.length
+    return { name: file.name, length: file.length }
+  })
+
+  const tabClients: Set<number> = new Set<number>()
+  Object.keys(torrentStateMap).filter(
+    key => torrentStateMap[key].infoHash === infoHash).map(
+      key => {
+        tabClients.add(torrentStateMap[key].tabId)
+      }
+    )
+
+  torrentObjMap[torrent.infoHash] = { ...torrentObjMap[torrent.infoHash],
+    files, downloaded, uploaded, downloadSpeed, uploadSpeed, progress, ratio,
+    numPeers, timeRemaining, length, tabClients }
+
+  return { ...state, torrentStateMap, torrentObjMap }
+}
+
+const updateServer = (state: TorrentsState, torrent: Torrent, serverURL: string) => {
+  const { torrentObjMap } = state
+  torrentObjMap[torrent.infoHash] = { ...torrentObjMap[torrent.infoHash], serverURL }
+  return { ...state, torrentObjMap }
+}
+
+const defaultState: TorrentsState = { currentWindowId: -1, activeTabIds: {}, torrentStateMap: {}, torrentObjMap: {} }
+const webtorrentReducer = (state: TorrentsState = defaultState, action: any) => { // TODO: modify any to be actual action type
+  const payload = action.payload
+  switch (action.type) {
+    case windowTypes.types.WINDOW_CREATED:
+      if (payload.window.focused || Object.keys(state.activeTabIds).length === 0) {
+        state = focusedWindowChanged(payload.window.id, state)
+      }
+      break
+    case windowTypes.types.WINDOW_REMOVED:
+      state = windowRemoved(payload.windowId, state)
+      break
+    case windowTypes.types.WINDOW_FOCUS_CHANGED:
+      state = focusedWindowChanged(payload.windowId, state)
+      break
+    case tabTypes.types.ACTIVE_TAB_CHANGED:
+      state = activeTabChanged(payload.tabId, payload.windowId, state)
+      break
+    case tabTypes.types.TAB_CREATED:
+      if (payload.tab.id && payload.tab.url) {
+        state = tabUpdated(payload.tab, payload.tab.url, state)
+      }
+      break
+    case tabTypes.types.TAB_UPDATED:
+      if (payload.changeInfo.url) {
+        state = tabUpdated(payload.tab.id, payload.changeInfo.url, state)
+      }
+      break
+    case tabTypes.types.TAB_REMOVED:
+      state = tabRemoved(payload.tabId, state)
+      break
+    case torrentTypes.types.WEBTORRENT_PROGRESS_UPDATED:
+      state = updateProgress(state, payload.torrent)
+      break
+    case torrentTypes.types.WEBTORRENT_INFO_UPDATED:
+      state = updateInfo(state, payload.torrent)
+      break
+    case torrentTypes.types.WEBTORRENT_SERVER_UPDATED:
+      state = updateServer(state, payload.torrent, payload.serverURL)
+      break
+    case torrentTypes.types.WEBTORRENT_START_TORRENT:
+      state = startTorrent(payload.torrentId, payload.tabId, state)
+      break
+    case torrentTypes.types.WEBTORRENT_STOP_DOWNLOAD:
+      state = stopDownload(payload.tabId, state)
+      break
+  }
+
+  return state
+}
+
+export default webtorrentReducer
diff --git a/components/brave_webtorrent/extension/background/store.ts b/components/brave_webtorrent/extension/background/store.ts
new file mode 100644
index 000000000000..3d0a0676b9b3
--- /dev/null
+++ b/components/brave_webtorrent/extension/background/store.ts
@@ -0,0 +1,31 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { applyMiddleware, createStore, Middleware } from 'redux'
+import { wrapStore } from 'react-chrome-redux'
+import { createLogger } from 'redux-logger'
+
+import reducers from './reducers'
+
+const logger = createLogger({
+  collapsed: true
+})
+
+const getMiddleware = () => {
+  const args: Middleware[] = []
+  if (process.env.NODE_ENV === `development`) {
+    args.push(logger)
+  }
+
+  return applyMiddleware(...args)
+}
+
+const initialState = {}
+const store = createStore(reducers, initialState, getMiddleware())
+
+wrapStore(store, {
+  portName: 'WEBTORRENT'
+})
+
+export default store
diff --git a/components/brave_webtorrent/extension/background/webtorrent.ts b/components/brave_webtorrent/extension/background/webtorrent.ts
new file mode 100644
index 000000000000..855d9c552f39
--- /dev/null
+++ b/components/brave_webtorrent/extension/background/webtorrent.ts
@@ -0,0 +1,57 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import * as WebTorrent from 'webtorrent'
+import { addTorrentEvents } from './events/torrentEvents'
+import { addWebtorrentEvents } from './events/webtorrentEvents'
+import { AddressInfo } from 'net'
+
+let webTorrent: WebTorrent.Instance
+let servers: { [key: string]: any } = { }
+
+export const init = () => {
+  webTorrent = new WebTorrent({ tracker: { wrtc: false } })
+  addWebtorrentEvents(webTorrent)
+}
+
+export const getWebTorrent = () => webTorrent
+
+export const createServer = (torrent: WebTorrent.Torrent, cb: (serverURL: string) => void) => {
+  if (!torrent.infoHash) return // torrent is not ready
+
+  const server = torrent.createServer()
+  if (!server) return
+
+  try {
+    server.listen(0, '127.0.0.1', undefined, () => {
+      // Explicitly cast server.address() to AddressInfo to access its
+      // properties. It's safe to cast here because the only possible type of
+      // server.address() here is AddressInfo since pipe name (as string) is
+      // not supported in chrome-net.
+      const addrInfo = server.address() as AddressInfo
+      servers[torrent.infoHash] = server
+      cb('http://' + addrInfo.address + ':' + addrInfo.port.toString())
+    })
+  } catch (error) {
+    console.log('server listen error: ', error)
+  }
+}
+
+export const addTorrent = (torrentId: string) => {
+  const torrentObj = webTorrent.add(torrentId)
+  addTorrentEvents(torrentObj)
+}
+
+export const findTorrent = (infoHash: string) => {
+  return webTorrent.torrents.find(torrent => torrent.infoHash === infoHash)
+}
+
+export const delTorrent = (infoHash: string) => {
+  const torrent = findTorrent(infoHash)
+  if (torrent) torrent.destroy()
+  if (servers[infoHash]) {
+    servers[infoHash].close()
+    delete servers[infoHash]
+  }
+}
diff --git a/components/brave_webtorrent/extension/brave_webtorrent.html b/components/brave_webtorrent/extension/brave_webtorrent.html
new file mode 100644
index 000000000000..25646c64c983
--- /dev/null
+++ b/components/brave_webtorrent/extension/brave_webtorrent.html
@@ -0,0 +1,14 @@
+<html>
+<head>
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width">
+<title>Webtorrent</title>
+<script src="out/brave_webtorrent.bundle.js"></script>
+<style>
+  #root { height: 100%; }
+</style>
+</head>
+<body>
+<div id="root"></div>
+</body>
+</html>
diff --git a/components/brave_webtorrent/extension/brave_webtorrent.tsx b/components/brave_webtorrent/extension/brave_webtorrent.tsx
new file mode 100644
index 000000000000..1d98b2ba66c3
--- /dev/null
+++ b/components/brave_webtorrent/extension/brave_webtorrent.tsx
@@ -0,0 +1,30 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import * as React from 'react'
+import { render } from 'react-dom'
+import { Provider } from 'react-redux'
+import { Store } from 'react-chrome-redux'
+
+// Components
+import App from './components/app'
+
+// Constants
+import { TorrentsState } from './constants/webtorrentState'
+
+const store: Store<TorrentsState> = new Store({
+  portName: 'WEBTORRENT'
+})
+
+store.ready().then(
+  () => {
+    render(
+      <Provider store={store}>
+      <App />
+      </Provider>,
+      document.getElementById('root'))
+  })
+  .catch(() => {
+    console.error('Problem mounting webtorrent')
+  })
diff --git a/components/brave_webtorrent/extension/components/app.tsx b/components/brave_webtorrent/extension/components/app.tsx
new file mode 100644
index 000000000000..16d36fd8553b
--- /dev/null
+++ b/components/brave_webtorrent/extension/components/app.tsx
@@ -0,0 +1,72 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import * as React from 'react'
+import { bindActionCreators, Dispatch } from 'redux'
+import { connect } from 'react-redux'
+
+// Components
+import MediaViewer from './mediaViewer'
+import TorrentViewer from './torrentViewer'
+
+// Constants
+import { TorrentObj, TorrentState, ApplicationState, getTorrentObj, getTorrentState } from '../constants/webtorrentState'
+
+// Utils
+import * as torrentActions from '../actions/webtorrent_actions'
+
+// Assets
+require('../../../styles/webtorrent.less')
+
+interface Props {
+  torrentState: TorrentState
+  torrentObj?: TorrentObj
+  actions: any
+}
+
+export class BraveWebtorrentPage extends React.Component<Props, {}> {
+  render () {
+    const { actions, torrentState, torrentObj } = this.props
+    const torrentId = decodeURIComponent(window.location.search.substring(1))
+
+    // The active tab change might not be propagated here yet, so we might get
+    // the old active tabId here which might be a different torrent page or a
+    // non-torrent page.
+    if (!torrentState || torrentId !== torrentState.torrentId) {
+      return (<div>Loading...</div>)
+    }
+
+    if (torrentObj && typeof(torrentState.ix) === 'number') {
+      return (
+        <MediaViewer
+          torrent={torrentObj}
+          ix={torrentState.ix}
+        />)
+    }
+
+    return (
+      <TorrentViewer
+        actions={actions}
+        name={torrentState.name}
+        torrentId={torrentState.torrentId}
+        errorMsg={torrentState.errorMsg}
+        torrent={torrentObj}
+        tabId={torrentState.tabId}
+      />)
+  }
+}
+
+export const mapStateToProps = (state: ApplicationState) => {
+  return { torrentState: getTorrentState(state.torrentsData),
+    torrentObj: getTorrentObj(state.torrentsData) }
+}
+
+export const mapDispatchToProps = (dispatch: Dispatch) => ({
+  actions: bindActionCreators(torrentActions, dispatch)
+})
+
+export default connect(
+  mapStateToProps,
+  mapDispatchToProps
+)(BraveWebtorrentPage)
diff --git a/components/brave_webtorrent/extension/components/mediaViewer.tsx b/components/brave_webtorrent/extension/components/mediaViewer.tsx
new file mode 100644
index 000000000000..4cfdb6701ef8
--- /dev/null
+++ b/components/brave_webtorrent/extension/components/mediaViewer.tsx
@@ -0,0 +1,72 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import * as React from 'react'
+
+// Constants
+import { TorrentObj } from '../constants/webtorrentState'
+
+const SUPPORTED_VIDEO_EXTENSIONS = [
+  'm4v',
+  'mkv',
+  'mov',
+  'mp4',
+  'ogv',
+  'webm'
+]
+
+const SUPPORTED_AUDIO_EXTENSIONS = [
+  'aac',
+  'mp3',
+  'ogg',
+  'wav',
+  'm4a'
+]
+
+// Given 'foo.txt', returns 'txt'
+// Given eg. null, undefined, '', or 'README', returns null
+const getExtension = (filename: string) => {
+  if (!filename) return null
+  const ix = filename.lastIndexOf('.')
+  if (ix < 0) return null
+  return filename.substring(ix + 1)
+}
+
+interface Props {
+  torrent: TorrentObj
+  ix: number
+}
+
+export default class MediaViewer extends React.PureComponent<Props, {}> {
+  render () {
+    const { torrent, ix } = this.props
+
+    const file = torrent.files ? torrent.files[ix] : undefined
+    const fileURL = torrent.serverURL && (torrent.serverURL + '/' + ix)
+
+    const fileExt = file && getExtension(file.name)
+    const isVideo = fileExt ? SUPPORTED_VIDEO_EXTENSIONS.includes(fileExt) : false
+    const isAudio = fileExt ? SUPPORTED_AUDIO_EXTENSIONS.includes(fileExt) : false
+
+    let content
+    if (!file || !torrent.serverURL) {
+      content = <div>Loading Media</div>
+    } else if (isVideo) {
+      content = <video src={fileURL} autoPlay={true} controls={true} />
+    } else if (isAudio) {
+      content = <audio src={fileURL} autoPlay={true} controls={true} />
+    } else {
+      // For security, sandbox and disallow scripts.
+      // We need allow-same-origin so that the iframe can load from
+      // http://localhost:...
+      content = <iframe src={fileURL} sandbox='allow-same-origin' />
+    }
+
+    return (
+      <div className='mediaViewer'>
+        {content}
+      </div>
+    )
+  }
+}
diff --git a/components/brave_webtorrent/extension/components/torrentFileList.tsx b/components/brave_webtorrent/extension/components/torrentFileList.tsx
new file mode 100644
index 000000000000..5d7a7270cd87
--- /dev/null
+++ b/components/brave_webtorrent/extension/components/torrentFileList.tsx
@@ -0,0 +1,94 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import * as React from 'react'
+import { Table } from 'brave-ui/components'
+import { Cell, Row } from 'brave-ui/components/dataTables/table/index.tsx'
+import { Heading } from 'brave-ui/old'
+
+// Constants
+import { File, TorrentObj } from '../constants/webtorrentState'
+
+interface Props {
+  torrentId: string
+  torrent?: TorrentObj
+}
+
+export default class TorrentFileList extends React.PureComponent<Props, {}> {
+  render () {
+    const { torrent } = this.props
+    if (!torrent || !torrent.files) {
+      return (
+        <div>
+          Click "Start Torrent" to load the torrent file list
+        </div>
+      )
+    }
+
+    const header: Cell[] = [
+      {
+        content: '#'
+      },
+      {
+        content: 'Name'
+      },
+      {
+        content: 'Save File'
+      },
+      {
+        content: 'Size'
+      }
+    ]
+
+    const renderFileLink = (file: File, ix: number, isDownload: boolean) => {
+      const { torrentId, torrent } = this.props
+      if (!torrent) return null
+      if (isDownload) {
+        if (torrent.serverURL) {
+          const url = torrent.serverURL + '/' + ix
+          return (<a href={url} download={file.name}>⇩</a>)
+        } else {
+          return (<div />) // No download links until the server is ready
+        }
+      } else {
+        const href = torrentId + '&ix=' + ix
+        return (<a href={href} target='_blank'> {file.name} </a>)
+      }
+    }
+
+    const rows: Row[] = torrent.files.map((file: File, index: number) => {
+      return ({
+        content: [
+          {
+            content: index + 1
+          },
+          {
+            content: renderFileLink(file, index, false)
+          },
+          {
+            content: renderFileLink(file, index, true)
+          },
+          {
+            content: file.length
+          }
+        ]
+      })
+    })
+
+    return (
+      <div>
+        <Heading
+          text='Files'
+          level={3}
+        />
+        <Table
+          header={header}
+          rows={rows}
+        >
+        'Loading the torrent file list...'
+        </Table>
+      </div>
+    )
+  }
+}
diff --git a/components/brave_webtorrent/extension/components/torrentStatus.tsx b/components/brave_webtorrent/extension/components/torrentStatus.tsx
new file mode 100644
index 000000000000..488fa6ef700a
--- /dev/null
+++ b/components/brave_webtorrent/extension/components/torrentStatus.tsx
@@ -0,0 +1,102 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import * as React from 'react'
+import * as prettierBytes from 'prettier-bytes'
+import { Column, Grid } from 'brave-ui/components'
+import { Heading } from 'brave-ui/old'
+
+// Constants
+import { TorrentObj } from '../constants/webtorrentState'
+
+interface Props {
+  torrent?: TorrentObj
+  errorMsg?: string
+}
+
+export default class TorrentStatus extends React.PureComponent<Props, {}> {
+  render () {
+    const { torrent, errorMsg } = this.props
+
+    if (errorMsg) {
+      return (
+        <div> {errorMsg} </div>
+      )
+    }
+
+    if (!torrent) {
+      return null
+    }
+
+    const renderStatus = () => {
+      const status = torrent.progress < 1 ? 'Downloading' : 'Seeding'
+      return (<Column size={2}> {status} </Column>)
+    }
+
+    const renderPercentage = () => {
+      const percentage = (torrent.progress < 1) ?
+        (torrent.progress * 100).toFixed(1) : '100'
+      return (<Column size={2}> {percentage} </Column>)
+    }
+
+    const renderSpeeds = () => {
+      let str = ''
+      if (torrent.downloadSpeed > 0) str += ' ↓ ' + prettierBytes(torrent.downloadSpeed) + '/s'
+      if (torrent.uploadSpeed > 0) str += ' ↑ ' + prettierBytes(torrent.uploadSpeed) + '/s'
+      if (str === '') return
+      return (<Column size={2}> {str} </Column>)
+    }
+
+    const renderTotalProgress = () => {
+      const downloaded = prettierBytes(torrent.downloaded)
+      const total = prettierBytes(torrent.length || 0)
+      if (downloaded === total) {
+        return (<Column size={2}> {downloaded} </Column>)
+      } else {
+        return (<Column size={2}> {downloaded} / {total} </Column>)
+      }
+    }
+
+    const renderPeers = () => {
+      if (torrent.numPeers === 0) return
+      const count = torrent.numPeers === 1 ? 'peer' : 'peers'
+      return (<Column size={2}> {torrent.numPeers} {count} </Column>)
+    }
+
+    const renderEta = () => {
+      if (torrent.timeRemaining === 0 || torrent.timeRemaining === Infinity) return // Zero download speed
+      if (torrent.downloaded === torrent.length) return // Already done
+
+      const rawEta = torrent.timeRemaining / 1000
+      const hours = Math.floor(rawEta / 3600) % 24
+      const minutes = Math.floor(rawEta / 60) % 60
+      const seconds = Math.floor(rawEta % 60)
+
+      // Only display hours and minutes if they are greater than 0 but always
+      // display minutes if hours is being displayed
+      const hoursStr = hours ? hours + 'h' : ''
+      const minutesStr = (hours || minutes) ? minutes + 'm' : ''
+      const secondsStr = seconds + 's'
+
+      return (<Column size={2}> {hoursStr} {minutesStr} {secondsStr} remaining </Column>)
+    }
+
+    return (
+      <div>
+        <Heading
+          text='Torrent Status'
+          level={3}
+        />
+        <Grid>
+          {renderStatus()}
+          {renderPercentage()}
+          {renderSpeeds()}
+          {renderTotalProgress()}
+          {renderPeers()}
+          {renderEta()}
+        </Grid>
+      </div>
+    )
+  }
+}
diff --git a/components/brave_webtorrent/extension/components/torrentViewer.tsx b/components/brave_webtorrent/extension/components/torrentViewer.tsx
new file mode 100644
index 000000000000..bdf4828ddd56
--- /dev/null
+++ b/components/brave_webtorrent/extension/components/torrentViewer.tsx
@@ -0,0 +1,53 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import * as React from 'react'
+
+// Components
+import TorrentViewerHeader from './torrentViewerHeader'
+import TorrentStatus from './torrentStatus'
+import TorrentFileList from './torrentFileList'
+import TorrentViewerFooter from './torrentViewerFooter'
+
+// Constants
+import { TorrentObj } from '../constants/webtorrentState'
+
+interface Props {
+  actions: any
+  tabId: number
+  name?: string | string[]
+  torrentId: string
+  errorMsg?: string
+  torrent?: TorrentObj
+}
+
+export default class TorrentViewer extends React.PureComponent<Props, {}> {
+  render () {
+    const { actions, tabId, name, torrentId, torrent, errorMsg } = this.props
+
+    return (
+      <div className='torrent-viewer'>
+        <TorrentViewerHeader
+          name={name}
+          torrent={torrent}
+          torrentId={torrentId}
+          tabId={tabId}
+          onStartTorrent={actions.startTorrent}
+          onStopDownload={actions.stopDownload}
+        />
+        <TorrentStatus
+          torrent={torrent}
+          errorMsg={errorMsg}
+        />
+        <TorrentFileList
+          torrentId={torrentId}
+          torrent={torrent}
+        />
+        <TorrentViewerFooter
+          torrent={torrent}
+        />
+      </div>
+    )
+  }
+}
diff --git a/components/brave_webtorrent/extension/components/torrentViewerFooter.tsx b/components/brave_webtorrent/extension/components/torrentViewerFooter.tsx
new file mode 100644
index 000000000000..8c982e83f3d4
--- /dev/null
+++ b/components/brave_webtorrent/extension/components/torrentViewerFooter.tsx
@@ -0,0 +1,47 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import * as React from 'react'
+import { Anchor, Heading, Paragraph } from 'brave-ui/old'
+
+// Constants
+import { TorrentObj } from '../constants/webtorrentState'
+
+// Themes
+import { theme } from '../constants/theme'
+
+interface Props {
+  torrent?: TorrentObj
+}
+
+export default class TorrentViewerFooter extends React.PureComponent<Props, {}> {
+  render () {
+    const { torrent } = this.props
+    const privacyNotice = 'When you click "Start Torrent", Brave will download pieces of the torrent file from other users and upload pieces to them in turn. This will share the fact that you\'re downloading this file: other people will know what you\'re downloading, and they may also have access to your public IP address.'
+
+    return (
+      torrent ?
+      (
+        <Anchor
+          href='https://webtorrent.io'
+          text='Powered By WebTorrent'
+          target='_blank'
+        />
+      )
+      :
+      (
+        <div className='privacy-warning'>
+          <Heading
+            text='Privacy Warning:'
+            level={4}
+          />
+        <Paragraph
+          text={privacyNotice}
+          theme={theme.privacyNoticeBody}
+        />
+        </div>
+      )
+    )
+  }
+}
diff --git a/components/brave_webtorrent/extension/components/torrentViewerHeader.tsx b/components/brave_webtorrent/extension/components/torrentViewerHeader.tsx
new file mode 100644
index 000000000000..cc9adc927227
--- /dev/null
+++ b/components/brave_webtorrent/extension/components/torrentViewerHeader.tsx
@@ -0,0 +1,72 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import * as React from 'react'
+import { ButtonPrimary, ButtonSecondary, Column, Grid } from 'brave-ui/components'
+import { TitleHeading } from 'brave-ui/old'
+
+// Constants
+import { TorrentObj } from '../constants/webtorrentState'
+
+// Themes
+import { theme } from '../constants/theme'
+
+let clipboardCopy = require('clipboard-copy')
+
+interface Props {
+  name?: string | string[]
+  torrent?: TorrentObj
+  torrentId: string
+  tabId: number
+  onStartTorrent: (torrentId: string, tabId: number) => void
+  onStopDownload: (tabId: number) => void
+}
+
+export default class TorrentViewerHeader extends React.PureComponent<Props, {}> {
+  constructor (props: Props) {
+    super(props)
+    this.onClick = this.onClick.bind(this)
+    this.onCopyClick = this.onCopyClick.bind(this)
+  }
+
+  onClick () {
+    this.props.torrent ? this.props.onStopDownload(this.props.tabId)
+                       : this.props.onStartTorrent(this.props.torrentId, this.props.tabId)
+  }
+
+  onCopyClick () {
+    clipboardCopy(this.props.torrentId)
+  }
+
+  render () {
+    const { name, torrent } = this.props
+    const title = name ? 'Start Torrenting "' + name + '"?'
+                       : 'Loading torrent information...'
+    const mainButtonText = torrent ? 'Stop Download' : 'Start Torrent'
+
+    return (
+      <Grid>
+        <Column size={9} theme={theme.headerColumnLeft}>
+          <TitleHeading
+            text={title}
+          />
+        </Column>
+        <Column size={3} theme={theme.headerColumnRight}>
+          <ButtonPrimary
+            text={mainButtonText}
+            color='brand'
+            size='medium'
+            onClick={this.onClick}
+          />
+          <ButtonSecondary
+            text='Copy Magnet Link'
+            color='brand'
+            size='medium'
+            onClick={this.onCopyClick}
+          />
+        </Column>
+      </Grid>
+    )
+  }
+}
diff --git a/components/brave_webtorrent/extension/constants/tab_types.ts b/components/brave_webtorrent/extension/constants/tab_types.ts
new file mode 100644
index 000000000000..e0aa759b0915
--- /dev/null
+++ b/components/brave_webtorrent/extension/constants/tab_types.ts
@@ -0,0 +1,10 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+export const enum types {
+  TAB_CREATED = '@@tab/TAB_CREATED',
+  TAB_UPDATED = '@@tab/TAB_UPDATED',
+  TAB_REMOVED = '@@tab/TAB_REMOVED',
+  ACTIVE_TAB_CHANGED = '@@tab/ACTIVE_TAB_CHANGED'
+}
diff --git a/components/brave_webtorrent/extension/constants/theme.ts b/components/brave_webtorrent/extension/constants/theme.ts
new file mode 100644
index 000000000000..66f957ca485d
--- /dev/null
+++ b/components/brave_webtorrent/extension/constants/theme.ts
@@ -0,0 +1,17 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+export const theme = {
+  headerColumnLeft: {
+    alignItems: 'center',
+    justifyContent: 'flex-start'
+  },
+  headerColumnRight: {
+    alignItems: 'center',
+    justifyContent: 'flex-end'
+  },
+  privacyNoticeBody: {
+    fontSize: '12px'
+  }
+}
diff --git a/components/brave_webtorrent/extension/constants/webtorrentState.ts b/components/brave_webtorrent/extension/constants/webtorrentState.ts
new file mode 100644
index 000000000000..f0bcebd33a2c
--- /dev/null
+++ b/components/brave_webtorrent/extension/constants/webtorrentState.ts
@@ -0,0 +1,74 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const getCurrentTabId = (state: TorrentsState) => {
+  return state.activeTabIds[state.currentWindowId]
+}
+
+export const getTorrentState = (state: TorrentsState) => {
+  return state.torrentStateMap[getCurrentTabId(state)]
+}
+
+export const getTorrentObj = (state: TorrentsState) => {
+  let torrent
+
+  const torrentState = getTorrentState(state)
+  if (torrentState && torrentState.infoHash) {
+    torrent = state.torrentObjMap[torrentState.infoHash]
+  }
+
+  return torrent
+}
+
+export interface ApplicationState {
+  torrentsData: TorrentsState
+}
+
+export interface ActiveTabIds {
+  [key: number]: number // windowId as key
+}
+
+export interface TorrentsState {
+  currentWindowId: number
+  activeTabIds: ActiveTabIds
+  torrentStateMap: TorrentStateMap
+  torrentObjMap: TorrentObjMap
+}
+
+export interface TorrentStateMap {
+  [key: number]: TorrentState // tabId as key
+}
+
+export interface TorrentObjMap {
+  [key: string]: TorrentObj // infoHash as key
+}
+
+export interface File {
+  name: string
+  length: number
+}
+
+export interface TorrentState {
+  tabId: number
+  torrentId: string
+  name?: string | string[]
+  infoHash?: string
+  errorMsg?: string
+  ix?: number | number[]
+}
+
+export interface TorrentObj {
+  files?: File[]
+  serverURL?: string
+  timeRemaining: number
+  downloaded: number
+  uploaded: number
+  downloadSpeed: number
+  uploadSpeed: number
+  progress: number
+  ratio: number
+  numPeers: number
+  length: number
+  tabClients: Set<number>
+}
diff --git a/components/brave_webtorrent/extension/constants/webtorrent_types.ts b/components/brave_webtorrent/extension/constants/webtorrent_types.ts
new file mode 100644
index 000000000000..64f700f4d529
--- /dev/null
+++ b/components/brave_webtorrent/extension/constants/webtorrent_types.ts
@@ -0,0 +1,11 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+export const enum types {
+  WEBTORRENT_PROGRESS_UPDATED = '@@webtorrent/WEBTORRENT_PROGRESS_UPDATED',
+  WEBTORRENT_INFO_UPDATED = '@@webtorrent/WEBTORRENT_INFO_UPDATED',
+  WEBTORRENT_SERVER_UPDATED = '@@webtorrent/WEBTORRENT_SERVER_UPDATED',
+  WEBTORRENT_START_TORRENT = '@@webtorrent/WEBTORRENT_START_TORRENT',
+  WEBTORRENT_STOP_DOWNLOAD = '@@webtorrent/WEBTORRENT_STOP_DOWNLOAD'
+}
diff --git a/components/brave_webtorrent/extension/constants/window_types.ts b/components/brave_webtorrent/extension/constants/window_types.ts
new file mode 100644
index 000000000000..904504e6c3a7
--- /dev/null
+++ b/components/brave_webtorrent/extension/constants/window_types.ts
@@ -0,0 +1,9 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+export const enum types {
+  WINDOW_CREATED = '@@window/WINDOW_CREATED',
+  WINDOW_REMOVED = '@@window/WINDOW_REMOVED',
+  WINDOW_FOCUS_CHANGED = '@@window/WINDOW_FOCUS_CHANGED'
+}
diff --git a/components/brave_webtorrent/extension/manifest.json b/components/brave_webtorrent/extension/manifest.json
new file mode 100644
index 000000000000..7c876744edac
--- /dev/null
+++ b/components/brave_webtorrent/extension/manifest.json
@@ -0,0 +1,24 @@
+{
+  "version": "1.0.0",
+  "name": "Brave Webtorrent",
+  "manifest_version": 2,
+  "description": "Webtorrent extension",
+  "background" : {
+    "scripts": ["extension/out/brave_webtorrent_background.bundle.js"],
+    "persistent": true
+  },
+  "permissions": ["tabs", "windows"],
+  "sockets": {
+    "udp": {
+      "send": "*",
+      "bind": "*"
+    },
+    "tcp": {
+      "connect": "*"
+    },
+    "tcpServer": {
+      "listen": "*:*"
+    }
+  },
+  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArfOx1MW/cb3YPNlmT37CuISYgRbtR1SIdgnx/cfTyXO/PuD1VVsQWLDmrZGDmYVCzZvP36t75uhpJH4IoXL58U16yhdXZeSlb0LKcgMZB6cMNyjznV4NTEeY+tLnwGaB1TVdkJgSlY09psyfvcdzQd8xz9CNE6CXDzEq8+uMSaoAyEJ3nP78yV33nBrMj3jbjTi1fr2QsrpoISql/pJ9Zr5V0QbK4wIqln20ly96KuAO5c1DM9z9VnoYFdirEZBfkT/4gB7pBfyd4ScoMhXuaa9w53N8Espu1bC0RGmaKB679rGQdaBTrEUGF+PNfsucjnyrsnup6GMVhc91CXTDjQIDAQAB"
+}
diff --git a/components/brave_webtorrent/resources.grd b/components/brave_webtorrent/resources.grd
new file mode 100644
index 000000000000..a20869d28514
--- /dev/null
+++ b/components/brave_webtorrent/resources.grd
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<grit base_dir="../" latest_public_release="0" current_release="1" output_all_resource_defines="true">
+  <outputs>
+    <output filename="grit/brave_webtorrent_resources.h" type="rc_header">
+      <emit emit_type='prepend'></emit>
+    </output>
+    <output filename="brave_webtorrent_resources.pak" type="data_package" />
+    <output filename="grit/brave_webtorrent_resources_map.cc" type="resource_file_map_source" />
+    <output filename="grit/brave_webtorrent_resources_map.h" type="resource_map_header" />
+  </outputs>
+  <release seq="1">
+    <includes first_id="37500">
+      <include name="IDR_BRAVE_WEBTORRENT" file="brave_webtorrent/extension/manifest.json" type="BINDATA" />
+      <include name="IDR_BRAVE_WEBTORRENT_HTML" file="brave_webtorrent/extension/brave_webtorrent.html" type="BINDATA" />
+      <include name="IDR_BRAVE_WEBTORRENT_BUNDLE_JS" file="brave_webtorrent/extension/out/brave_webtorrent.bundle.js" type="BINDATA" />
+      <include name="IDR_BRAVE_WEBTORRENT_BACKGROUND_JS" file="brave_webtorrent/extension/out/brave_webtorrent_background.bundle.js" type="BINDATA" />
+    </includes>
+  </release>
+</grit>
diff --git a/components/brave_welcome_ui/BUILD.gn b/components/brave_welcome_ui/BUILD.gn
index 709e51140626..96587d3cf22b 100644
--- a/components/brave_welcome_ui/BUILD.gn
+++ b/components/brave_welcome_ui/BUILD.gn
@@ -20,5 +20,5 @@ transpile_web_ui("brave_welcome_ui") {
     "reducers/welcome_reducer.ts",
   ]
 
-  bundle_name = "brave_welcome.bundle.js"
+  bundle_names = ["brave_welcome.bundle.js"]
 }
diff --git a/components/common/typescript.gni b/components/common/typescript.gni
index b542b461db18..64d26de5791b 100644
--- a/components/common/typescript.gni
+++ b/components/common/typescript.gni
@@ -5,8 +5,6 @@ brave_common_typescript_includes = [
 ]
 
 template("transpile_web_ui") {
-  bundle_name = invoker.bundle_name
-
   action(target_name) {
     script = "//brave/script/transpile-web-ui.py"
 
@@ -15,11 +13,16 @@ template("transpile_web_ui") {
       inputs += invoker.inputs
     }
 
-    output_dir = "$root_gen_dir/brave"
+    if (defined(invoker.output_dir)) {
+      output_dir = invoker.output_dir
+    } else {
+      output_dir = "$root_gen_dir/brave"
+    }
 
-    outputs = [
-      "$output_dir/$bundle_name"
-    ]
+    outputs = []
+    foreach(bundle_name, invoker.bundle_names) {
+      outputs += ["$output_dir/$bundle_name"]
+    }
 
     gen_dir = rebase_path(output_dir)
     args = [
diff --git a/components/definitions/prettier-bytes.d.ts b/components/definitions/prettier-bytes.d.ts
new file mode 100644
index 000000000000..85b3b702f038
--- /dev/null
+++ b/components/definitions/prettier-bytes.d.ts
@@ -0,0 +1,5 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+declare module 'prettier-bytes'
diff --git a/components/definitions/throttleit.d.ts b/components/definitions/throttleit.d.ts
new file mode 100644
index 000000000000..242fdcd562bb
--- /dev/null
+++ b/components/definitions/throttleit.d.ts
@@ -0,0 +1,5 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+declare module 'throttleit'
diff --git a/components/styles/webtorrent.less b/components/styles/webtorrent.less
new file mode 100644
index 000000000000..732c03f1bd1a
--- /dev/null
+++ b/components/styles/webtorrent.less
@@ -0,0 +1,16 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+body {
+  padding: 20px
+}
+
+h3 {
+  color: rgb(255, 80, 0);
+}
+
+a {
+  text-decoration: none;
+  color: #686978;
+}
diff --git a/components/test/brave_webtorrent/actions/tab_action_test.ts b/components/test/brave_webtorrent/actions/tab_action_test.ts
new file mode 100644
index 000000000000..040362b2665d
--- /dev/null
+++ b/components/test/brave_webtorrent/actions/tab_action_test.ts
@@ -0,0 +1,58 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { types } from '../../../brave_webtorrent/extension/constants/tab_types'
+import * as actions from '../../../brave_webtorrent/extension/actions/tab_actions'
+
+const tab: chrome.tabs.Tab = {
+  id: 1,
+  index: 1,
+  pinned: false,
+  highlighted: false,
+  windowId: 1,
+  active: true,
+  incognito: false,
+  selected: false
+}
+
+const changeInfo: chrome.tabs.TabChangeInfo = {
+  url: 'https://test.com'
+}
+
+const tabId: number = 1
+const windowId: number = 2
+
+describe('tab_actions', () => {
+  it('tabCreated', () => {
+    expect(actions.tabCreated(tab)).toEqual({
+      type: types.TAB_CREATED,
+      meta: undefined,
+      payload: { tab }
+    })
+  })
+
+  it('tabUpdated', () => {
+    expect(actions.tabUpdated(tabId, changeInfo, tab)).toEqual({
+      type: types.TAB_UPDATED,
+      meta: undefined,
+      payload: { tabId, changeInfo, tab }
+    })
+  })
+
+  it('tabRemoved', () => {
+    expect(actions.tabRemoved(tabId)).toEqual({
+      type: types.TAB_REMOVED,
+      meta: undefined,
+      payload: { tabId }
+    })
+  })
+
+  it('activeTabChanged', () => {
+    expect(actions.activeTabChanged(tabId, windowId)).toEqual({
+      type: types.ACTIVE_TAB_CHANGED,
+      meta: undefined,
+      payload: { tabId, windowId }
+    })
+  })
+})
diff --git a/components/test/brave_webtorrent/actions/webtorrent_action_test.ts b/components/test/brave_webtorrent/actions/webtorrent_action_test.ts
new file mode 100644
index 000000000000..f357cf0c77ec
--- /dev/null
+++ b/components/test/brave_webtorrent/actions/webtorrent_action_test.ts
@@ -0,0 +1,67 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { types } from '../../../brave_webtorrent/extension/constants/webtorrent_types'
+import * as actions from '../../../brave_webtorrent/extension/actions/webtorrent_actions'
+import { Torrent } from 'webtorrent'
+
+const torrent: Torrent = {
+  infoHash: 'infoHash',
+  magnetURI: 'uri',
+  timeRemaining: 0,
+  downloaded: 0,
+  uploaded: 0,
+  downloadSpeed: 0,
+  uploadSpeed: 0,
+  progress: 0,
+  ratio: 0,
+  numPeers: 0,
+  length: 0
+}
+
+describe('webtorrent_actions', () => {
+  it('progressUpdated', () => {
+    expect(actions.progressUpdated(torrent)).toEqual({
+      type: types.WEBTORRENT_PROGRESS_UPDATED,
+      meta: undefined,
+      payload: { torrent }
+    })
+  })
+
+  it('infoUpdated', () => {
+    expect(actions.infoUpdated(torrent)).toEqual({
+      type: types.WEBTORRENT_INFO_UPDATED,
+      meta: undefined,
+      payload: { torrent }
+    })
+  })
+
+  it('serverUpdated', () => {
+    const serverURL = 'https://localhost:12345'
+    expect(actions.serverUpdated(torrent, serverURL)).toEqual({
+      type: types.WEBTORRENT_SERVER_UPDATED,
+      meta: undefined,
+      payload: { torrent, serverURL }
+    })
+  })
+
+  it('startTorrent', () => {
+    const torrentId = 'id'
+    const tabId = 1
+    expect(actions.startTorrent(torrentId, tabId)).toEqual({
+      type: types.WEBTORRENT_START_TORRENT,
+      meta: undefined,
+      payload: { torrentId, tabId }
+    })
+  })
+
+  it('stopDownload', () => {
+    const tabId = 1
+    expect(actions.stopDownload(tabId)).toEqual({
+      type: types.WEBTORRENT_STOP_DOWNLOAD,
+      meta: undefined,
+      payload: { tabId }
+    })
+  })
+})
diff --git a/components/test/brave_webtorrent/actions/window_action_test.ts b/components/test/brave_webtorrent/actions/window_action_test.ts
new file mode 100644
index 000000000000..903dab9fc8e8
--- /dev/null
+++ b/components/test/brave_webtorrent/actions/window_action_test.ts
@@ -0,0 +1,42 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { types } from '../../../brave_webtorrent/extension/constants/window_types'
+import * as actions from '../../../brave_webtorrent/extension/actions/window_actions'
+
+describe('window_actions', () => {
+  it('windowCreated', () => {
+    const window: chrome.windows.Window = {
+      id: 1,
+      state: 'normal',
+      focused: true,
+      alwaysOnTop: false,
+      incognito: false,
+      type: 'normal'
+    }
+    expect(actions.windowCreated(window)).toEqual({
+      type: types.WINDOW_CREATED,
+      meta: undefined,
+      payload: { window }
+    })
+  })
+
+  const windowId = 7
+
+  it('windowRemoved', () => {
+    expect(actions.windowRemoved(windowId)).toEqual({
+      type: types.WINDOW_REMOVED,
+      meta: undefined,
+      payload: { windowId }
+    })
+  })
+
+  it('windowFocusChanged', () => {
+    expect(actions.windowFocusChanged(windowId)).toEqual({
+      type: types.WINDOW_FOCUS_CHANGED,
+      meta: undefined,
+      payload: { windowId }
+    })
+  })
+})
diff --git a/components/test/brave_webtorrent/components/app_test.tsx b/components/test/brave_webtorrent/components/app_test.tsx
new file mode 100644
index 000000000000..a6962989a6fc
--- /dev/null
+++ b/components/test/brave_webtorrent/components/app_test.tsx
@@ -0,0 +1,42 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import * as React from 'react'
+import { shallow } from 'enzyme'
+import { applicationState, torrentState, torrentObj } from '../testData'
+import { TorrentState } from '../../../brave_webtorrent/extension/constants/webtorrentState'
+import { BraveWebtorrentPage, mapStateToProps, } from '../../../brave_webtorrent/extension/components/app'
+
+describe('BraveWebtorrentPage component', () => {
+  describe('mapStateToProps', () => {
+    it('should map the default state', () => {
+      expect(mapStateToProps(applicationState)).toEqual({
+        torrentState
+      })
+    })
+  })
+
+  describe('render BraveWebtorrentPage component', () => {
+    it('renders the MediaViewer component with a torrent and ix', () => {
+      const torrentStateWithIx : TorrentState = { ...torrentState, ix: 1 }
+      const wrapper = shallow(
+        <BraveWebtorrentPage
+          torrentState={torrentStateWithIx}
+          torrentObj={torrentObj}
+          actions={{}}
+        />
+      )
+      expect(wrapper.hasClass('media-viewer'))
+    })
+    it('renders the TorrentViewer component with a valid torrent state', () => {
+      const wrapper = shallow(
+        <BraveWebtorrentPage
+          torrentState={torrentState}
+          actions={{}}
+        />
+      )
+      expect(wrapper.hasClass('torrent-viewer'))
+    })
+  })
+})
diff --git a/components/test/brave_webtorrent/testData.ts b/components/test/brave_webtorrent/testData.ts
new file mode 100644
index 000000000000..c39efb77d99c
--- /dev/null
+++ b/components/test/brave_webtorrent/testData.ts
@@ -0,0 +1,45 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { ActiveTabIds, ApplicationState, TorrentObj, TorrentState, TorrentStateMap, TorrentObjMap, TorrentsState }  from '../../brave_webtorrent/extension/constants/webtorrentState.ts'
+
+export const currentWindowId : number = 0
+
+export const activeTabIds : ActiveTabIds = { 0: 0, 1: 1 }
+
+export const torrentState : TorrentState = {
+  tabId: 0, torrentId: 'testTorrentId'
+}
+
+export const torrentObj : TorrentObj = {
+  timeRemaining: 0,
+  downloaded: 0,
+  uploaded: 0,
+  downloadSpeed: 0,
+  uploadSpeed: 0,
+  progress: 0,
+  ratio: 0,
+  numPeers: 0,
+  length: 0,
+  tabClients: new Set<number>()
+}
+
+export const torrentStateMap : TorrentStateMap = {
+  0: torrentState
+}
+
+export const torrentObjMap : TorrentObjMap = {
+  'infoHash': torrentObj
+}
+
+export const torrentsState: TorrentsState = {
+  activeTabIds,
+  currentWindowId,
+  torrentStateMap,
+  torrentObjMap
+}
+
+export const applicationState: ApplicationState = {
+  torrentsData: torrentsState
+}
diff --git a/components/test/testPolyfills.ts b/components/test/testPolyfills.ts
index b3cd3ba2356a..d5317f6dd01f 100644
--- a/components/test/testPolyfills.ts
+++ b/components/test/testPolyfills.ts
@@ -5,10 +5,17 @@
 import { getMockChrome } from './testData'
 
 (global as any).window = {} as any
+
 (window as any).localStorage = {
   getItem: jest.fn()
 } as any
 
+(window as any).location = {
+  search: '?testTorrentId'
+} as any
+
+(window as any).decodeURIComponent = (any) => 'test'
+
 // This mocks rAF to avoid React console.error
 // while running Jest tests
 (global as any).requestAnimationFrame = function (cb: () => void) {
diff --git a/components/webpack/dev.config.js b/components/webpack/dev.config.js
index 4098c611bb4d..75d0e8edb72a 100644
--- a/components/webpack/dev.config.js
+++ b/components/webpack/dev.config.js
@@ -8,7 +8,9 @@ module.exports = {
     brave_adblock: path.join(__dirname, '../brave_adblock_ui/brave_adblock'),
     brave_new_tab: path.join(__dirname, '../brave_new_tab_ui/brave_new_tab'),
     brave_rewards: path.join(__dirname, '../brave_rewards_ui/brave_rewards'),
-    brave_welcome: path.join(__dirname, '../brave_welcome_ui/brave_welcome')
+    brave_welcome: path.join(__dirname, '../brave_welcome_ui/brave_welcome'),
+    brave_webtorrent: path.join(__dirname, '../brave_webtorrent/extension/brave_webtorrent'),
+    brave_webtorrent_background: path.join(__dirname, '../brave_webtorrent/extension/background'),
   },
   output: {
     path: process.env.TARGET_GEN_DIR,
@@ -20,7 +22,11 @@ module.exports = {
     new webpack.IgnorePlugin(/[^/]+\/[\S]+.dev$/)
   ],
   resolve: {
-    extensions: ['.js', '.tsx', '.ts']
+    extensions: ['.js', '.tsx', '.ts', '.json'],
+    alias: {
+      'dgram': 'chrome-dgram',
+      'net': 'chrome-net'
+    }
   },
   module: {
     rules: [
@@ -53,6 +59,9 @@ module.exports = {
         test: /\.(ttf|eot|svg|png|jpg)(\?v=[0-9]\.[0-9]\.[0-9])?$/,
         loader: 'file-loader'
       }]
+  },
+  node: {
+    fs: 'empty'
   }
 }
 
diff --git a/components/webpack/prod.config.js b/components/webpack/prod.config.js
index 8f6a7aaa5274..1b5a94d89fe3 100644
--- a/components/webpack/prod.config.js
+++ b/components/webpack/prod.config.js
@@ -8,7 +8,9 @@ module.exports = {
     brave_adblock: path.join(__dirname, '../brave_adblock_ui/brave_adblock'),
     brave_new_tab: path.join(__dirname, '../brave_new_tab_ui/brave_new_tab'),
     brave_rewards: path.join(__dirname, '../brave_rewards_ui/brave_rewards'),
-    brave_welcome: path.join(__dirname, '../brave_welcome_ui/brave_welcome')
+    brave_welcome: path.join(__dirname, '../brave_welcome_ui/brave_welcome'),
+    brave_webtorrent: path.join(__dirname, '../brave_webtorrent/extension/brave_webtorrent'),
+    brave_webtorrent_background: path.join(__dirname, '../brave_webtorrent/extension/background'),
   },
   output: {
     path: process.env.TARGET_GEN_DIR,
@@ -31,7 +33,11 @@ module.exports = {
     })
   ],
   resolve: {
-    extensions: ['.js', '.tsx', '.ts']
+    extensions: ['.js', '.tsx', '.ts', '.json'],
+    alias: {
+      'dgram': 'chrome-dgram',
+      'net': 'chrome-net'
+    }
   },
   module: {
     rules: [
@@ -64,5 +70,8 @@ module.exports = {
         test: /\.(ttf|eot|svg|png|jpg)(\?v=[0-9]\.[0-9]\.[0-9])?$/,
         loader: 'file-loader'
       }]
+  },
+  node: {
+    fs: 'empty'
   }
 }
diff --git a/net/BUILD.gn b/net/BUILD.gn
new file mode 100644
index 000000000000..1537e800b91d
--- /dev/null
+++ b/net/BUILD.gn
@@ -0,0 +1,9 @@
+source_set("net") {
+  sources = [
+    "url_request/magnet_protocol_handler.cc",
+    "url_request/magnet_protocol_handler.h",
+  ]
+  deps = [
+    "//net"
+  ]
+}
diff --git a/net/url_request/magnet_protocol_handler.cc b/net/url_request/magnet_protocol_handler.cc
new file mode 100644
index 000000000000..6c017ddc2f7a
--- /dev/null
+++ b/net/url_request/magnet_protocol_handler.cc
@@ -0,0 +1,43 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "brave/net/url_request/magnet_protocol_handler.h"
+
+#include "brave/common/network_constants.h"
+#include "base/strings/string_util.h"
+#include "net/base/escape.h"
+#include "net/base/net_errors.h"
+#include "net/url_request/url_request_error_job.h"
+#include "net/url_request/url_request_redirect_job.h"
+
+MagnetProtocolHandler::MagnetProtocolHandler() {
+}
+
+MagnetProtocolHandler::~MagnetProtocolHandler() {
+}
+
+GURL MagnetProtocolHandler::TranslateURL(const GURL& url) const {
+  GURL extension_page_url(
+      "chrome-extension://lgjmpdmojkpocjcopdikifhejkkjglho/extension/brave_webtorrent.html?%s");
+  std::string translatedSpec(extension_page_url.spec());
+  base::ReplaceFirstSubstringAfterOffset(
+      &translatedSpec, 0, "%s",
+      net::EscapeQueryParamValue(url.spec(), true));
+  return GURL(translatedSpec);
+}
+
+net::URLRequestJob* MagnetProtocolHandler::MaybeCreateJob(
+    net::URLRequest* request, net::NetworkDelegate* network_delegate) const {
+
+  GURL translated_url(TranslateURL(request->url()));
+  if (!translated_url.is_valid()) {
+    return new net::URLRequestErrorJob(
+        request, network_delegate, net::ERR_INVALID_URL);
+  }
+
+  return new net::URLRequestRedirectJob(
+      request, network_delegate, translated_url,
+      net::URLRequestRedirectJob::REDIRECT_307_TEMPORARY_REDIRECT,
+      "WebTorrent");
+}
diff --git a/net/url_request/magnet_protocol_handler.h b/net/url_request/magnet_protocol_handler.h
new file mode 100644
index 000000000000..25d80732a965
--- /dev/null
+++ b/net/url_request/magnet_protocol_handler.h
@@ -0,0 +1,24 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef BRAVE_NET_URL_REQUEST_MAGNET_PROTOCOL_HANDLER_H_
+#define BRAVE_NET_URL_REQUEST_MAGNET_PROTOCOL_HANDLER_H_
+
+#include "net/url_request/url_request_job_factory.h"
+
+class MagnetProtocolHandler : public net::URLRequestJobFactory::ProtocolHandler {
+  public:
+    MagnetProtocolHandler();
+    ~MagnetProtocolHandler() override;
+
+    net::URLRequestJob* MaybeCreateJob(
+      net::URLRequest* request,
+      net::NetworkDelegate* network_delegate) const override;
+
+  private:
+    GURL TranslateURL(const GURL& url) const;
+    DISALLOW_COPY_AND_ASSIGN(MagnetProtocolHandler);
+};
+
+#endif // BRAVE_NET_URL_REQUEST_MAGNET_PROTOCOL_HANDLER_H_
diff --git a/package-lock.json b/package-lock.json
index 64cd0aa1a4b8..bdbf3b8b8f56 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -67,6 +67,14 @@
         }
       }
     },
+    "@types/bittorrent-protocol": {
+      "version": "2.2.2",
+      "resolved": "https://registry.npmjs.org/@types/bittorrent-protocol/-/bittorrent-protocol-2.2.2.tgz",
+      "integrity": "sha512-VAPyW8eGh8FjyGxBSKyPSH60Qkxo3r2W4sDYXCQJYfYD49UnA1SUP+5GQ/4MgbdiEDSp9YW4yuebpIR/vstD5Q==",
+      "requires": {
+        "@types/node": "*"
+      }
+    },
     "@types/cheerio": {
       "version": "0.22.8",
       "resolved": "https://registry.npmjs.org/@types/cheerio/-/cheerio-0.22.8.tgz",
@@ -122,11 +130,36 @@
       "integrity": "sha512-/UMY+2GkOZ27Vrc51pqC5J8SPd39FKt7kkoGAtWJ8s4msj0b15KehDWIiJpWY3/7tLxBQLLzJhIBhnEsXdzpgw==",
       "dev": true
     },
+    "@types/magnet-uri": {
+      "version": "5.1.1",
+      "resolved": "https://registry.npmjs.org/@types/magnet-uri/-/magnet-uri-5.1.1.tgz",
+      "integrity": "sha1-hhqvZMkqMTfdhI/vxVzTUqjqhRo=",
+      "requires": {
+        "@types/node": "*"
+      }
+    },
     "@types/node": {
       "version": "10.5.5",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-10.5.5.tgz",
-      "integrity": "sha512-6Qnb1gXbp3g1JX9QVJj3A6ORzc9XCyhokxUKaoonHgNXcQhmk8adhotxfkeK8El9TnFeUuH72yI6jQ5nDJKS6w==",
-      "dev": true
+      "integrity": "sha512-6Qnb1gXbp3g1JX9QVJj3A6ORzc9XCyhokxUKaoonHgNXcQhmk8adhotxfkeK8El9TnFeUuH72yI6jQ5nDJKS6w=="
+    },
+    "@types/parse-torrent": {
+      "version": "5.8.2",
+      "resolved": "https://registry.npmjs.org/@types/parse-torrent/-/parse-torrent-5.8.2.tgz",
+      "integrity": "sha512-wfXO0N2vNkk/W1CEiPbT+7GPiOe3fnRLecdFBw/HNxPyx6czOGqUYi8bw2dbjEmYqWSsqhMdrajEd6o5ry2p4w==",
+      "requires": {
+        "@types/magnet-uri": "*",
+        "@types/node": "*",
+        "@types/parse-torrent-file": "*"
+      }
+    },
+    "@types/parse-torrent-file": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/@types/parse-torrent-file/-/parse-torrent-file-4.0.1.tgz",
+      "integrity": "sha1-BWpsGPP6wM18bHRUDwBJajIll2s=",
+      "requires": {
+        "@types/node": "*"
+      }
     },
     "@types/react": {
       "version": "16.4.7",
@@ -166,6 +199,46 @@
         "redux": "^4.0.0"
       }
     },
+    "@types/redux-logger": {
+      "version": "3.0.6",
+      "resolved": "https://registry.npmjs.org/@types/redux-logger/-/redux-logger-3.0.6.tgz",
+      "integrity": "sha512-HXVJnbyuTcVtQ+qiwDcbLEMoOgNjKnNYVKx29P4NhV+FIgVVRCFILEPzjgSxlmMLc6aBVaEew7PfE3421DZ6Jw==",
+      "requires": {
+        "redux": "^3.6.0"
+      },
+      "dependencies": {
+        "redux": {
+          "version": "3.7.2",
+          "resolved": "https://registry.npmjs.org/redux/-/redux-3.7.2.tgz",
+          "integrity": "sha512-pNqnf9q1hI5HHZRBkj3bAngGZW/JMCmexDlOxw4XagXY2o1327nHH54LoTjiPJ0gizoqPDRqWyX/00g0hD6w+A==",
+          "requires": {
+            "lodash": "^4.2.1",
+            "lodash-es": "^4.2.1",
+            "loose-envify": "^1.1.0",
+            "symbol-observable": "^1.0.3"
+          }
+        }
+      }
+    },
+    "@types/simple-peer": {
+      "version": "6.1.5",
+      "resolved": "https://registry.npmjs.org/@types/simple-peer/-/simple-peer-6.1.5.tgz",
+      "integrity": "sha512-huXri3g0rQpIO5jkG630a2sBrh1WXgsd2Gsoc9MqWTRZ0AWqyMEcMCfLXmw5i8AvrZbjAT6BIxW2gEqvpqSYwA==",
+      "requires": {
+        "@types/node": "*"
+      }
+    },
+    "@types/webtorrent": {
+      "version": "0.98.4",
+      "resolved": "https://registry.npmjs.org/@types/webtorrent/-/webtorrent-0.98.4.tgz",
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     "wrappy": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
-      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
-      "dev": true
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
     },
     "write-file-atomic": {
       "version": "2.3.0",
@@ -11163,8 +12177,7 @@
     "xtend": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz",
-      "integrity": "sha1-pcbVMr5lbiPbgg77lDofBJmNY68=",
-      "dev": true
+      "integrity": "sha1-pcbVMr5lbiPbgg77lDofBJmNY68="
     },
     "y18n": {
       "version": "3.2.1",
@@ -11242,6 +12255,11 @@
           "dev": true
         }
       }
+    },
+    "zero-fill": {
+      "version": "2.2.3",
+      "resolved": "https://registry.npmjs.org/zero-fill/-/zero-fill-2.2.3.tgz",
+      "integrity": "sha1-o97wa6XjmuZEhQu0yirUEStIVek="
     }
   }
 }
diff --git a/package.json b/package.json
index 40f373b17a02..fd2bb2767dd3 100644
--- a/package.json
+++ b/package.json
@@ -72,7 +72,7 @@
     ],
     "moduleNameMapper": {
       "\\.(jpg|jpeg|png|gif|eot|otf|svg|ttf|woff|woff2)$": "<rootDir>/components/test/fileMock.ts",
-      "\\.(css)$": "identity-obj-proxy"
+      "\\.(css|less)$": "identity-obj-proxy"
     }
   },
   "devDependencies": {
@@ -122,5 +122,18 @@
     "url-loader": "^0.6.2",
     "webpack": "^4.16.0",
     "webpack-cli": "^3.0.8"
+  },
+  "dependencies": {
+    "@types/redux-logger": "^3.0.6",
+    "@types/webtorrent": "^0.98.4",
+    "chrome-dgram": "^3.0.1",
+    "chrome-net": "^3.3.1",
+    "clipboard-copy": "^2.0.0",
+    "http-node": "^1.2.0",
+    "prettier-bytes": "^1.0.4",
+    "react-chrome-redux": "^1.5.1",
+    "redux-logger": "^3.0.6",
+    "throttleit": "^1.0.0",
+    "webtorrent": "^0.102.0"
   }
 }
diff --git a/patches/chrome-browser-extensions-component_extensions_whitelist-whitelist.cc.patch b/patches/chrome-browser-extensions-component_extensions_whitelist-whitelist.cc.patch
deleted file mode 100644
index d561c5327959..000000000000
--- a/patches/chrome-browser-extensions-component_extensions_whitelist-whitelist.cc.patch
+++ /dev/null
@@ -1,28 +0,0 @@
-diff --git a/chrome/browser/extensions/component_extensions_whitelist/whitelist.cc b/chrome/browser/extensions/component_extensions_whitelist/whitelist.cc
-index dfc12043f6c68fd0a258ae54cb2dd8e12f9117a0..2e56d1e21fbc2a6ba1149be0de102a80b4698c52 100644
---- a/chrome/browser/extensions/component_extensions_whitelist/whitelist.cc
-+++ b/chrome/browser/extensions/component_extensions_whitelist/whitelist.cc
-@@ -12,6 +12,7 @@
- #include "chrome/common/buildflags.h"
- #include "chrome/common/extensions/extension_constants.h"
- #include "chrome/grit/browser_resources.h"
-+#include "components/grit/brave_components_resources.h"
- #include "extensions/common/constants.h"
- #include "printing/buildflags/buildflags.h"
- 
-@@ -38,6 +39,7 @@ bool IsComponentExtensionWhitelisted(const std::string& extension_id) {
-     extension_misc::kZIPUnpackerExtensionId,
-     extension_misc::kZipArchiverExtensionId,
- #endif
-+    "mnojpmjdmbbfmejpflffifhffcmidifd"
-   };
- 
-   for (size_t i = 0; i < arraysize(kAllowed); ++i) {
-@@ -60,6 +62,7 @@ bool IsComponentExtensionWhitelisted(const std::string& extension_id) {
- bool IsComponentExtensionWhitelisted(int manifest_resource_id) {
-   switch (manifest_resource_id) {
-     // Please keep the list in alphabetical order.
-+    case IDR_BRAVE_EXTENSON:
- #if BUILDFLAG(ENABLE_APP_LIST)
-     case IDR_CHROME_APP_MANIFEST:
- #endif
diff --git a/patches/extensions-browser-extension_function.cc.patch b/patches/extensions-browser-extension_function.cc.patch
new file mode 100644
index 000000000000..81dc892d3402
--- /dev/null
+++ b/patches/extensions-browser-extension_function.cc.patch
@@ -0,0 +1,14 @@
+diff --git a/extensions/browser/extension_function.cc b/extensions/browser/extension_function.cc
+index 38706e90a709e6a7985d53c0ec2c135b6db86902..a0e874388e1afdd9775e790a5d4844faa174f3fb 100644
+--- a/extensions/browser/extension_function.cc
++++ b/extensions/browser/extension_function.cc
+@@ -500,7 +500,9 @@ UIThreadExtensionFunction::~UIThreadExtensionFunction() {
+   // tricky because checking IsShuttingDown has to be called from the UI thread.
+   extensions::ExtensionsBrowserClient* browser_client =
+       extensions::ExtensionsBrowserClient::Get();
++
+   DCHECK(!browser_client || browser_client->IsShuttingDown() || did_respond() ||
++         !strncmp(name(), "sockets.tcp.connect", 20) || // TO BE REMOVED
+          ignore_all_did_respond_for_testing_do_not_use)
+       << name();
+ }
diff --git a/patches/net-BUILD.gn.patch b/patches/net-BUILD.gn.patch
new file mode 100644
index 000000000000..48bd1cea4d48
--- /dev/null
+++ b/patches/net-BUILD.gn.patch
@@ -0,0 +1,13 @@
+diff --git a/net/BUILD.gn b/net/BUILD.gn
+index 7f9901a8826ce131181b3febdef9b911bae23d12..065e37608dad0cea7903830bab956903463441bb 100644
+--- a/net/BUILD.gn
++++ b/net/BUILD.gn
+@@ -1713,6 +1713,8 @@ component("net") {
+       "url_request/view_cache_helper.h",
+       "url_request/websocket_handshake_userdata_key.cc",
+       "url_request/websocket_handshake_userdata_key.h",
++      "//brave/net/url_request/magnet_protocol_handler.cc",
++      "//brave/net/url_request/magnet_protocol_handler.h",
+     ]
+ 
+     if (enable_reporting) {
diff --git a/patches/net-url_request-url_request_context_builder.cc.patch b/patches/net-url_request-url_request_context_builder.cc.patch
new file mode 100644
index 000000000000..d4e7e0c15668
--- /dev/null
+++ b/patches/net-url_request-url_request_context_builder.cc.patch
@@ -0,0 +1,13 @@
+diff --git a/net/url_request/url_request_context_builder.cc b/net/url_request/url_request_context_builder.cc
+index 800515a58cfa8546288d961fc9d14ae4676fcb5f..c75eec623aa0aff28ed8fd0607af082bc58de768 100644
+--- a/net/url_request/url_request_context_builder.cc
++++ b/net/url_request/url_request_context_builder.cc
+@@ -621,6 +621,8 @@ std::unique_ptr<URLRequestContext> URLRequestContextBuilder::Build() {
+   }
+ #endif  // !BUILDFLAG(DISABLE_FTP_SUPPORT)
+ 
++  job_factory->SetProtocolHandler("magnet", std::make_unique<MagnetProtocolHandler>());
++
+   std::unique_ptr<URLRequestJobFactory> top_job_factory(job_factory);
+   if (!url_request_interceptors_.empty()) {
+     // Set up interceptors in the reverse order.
diff --git a/patches/tools-json_schema_compiler-feature_compiler.py.patch b/patches/tools-json_schema_compiler-feature_compiler.py.patch
index 731997ec7c45..dd9f932c0943 100644
--- a/patches/tools-json_schema_compiler-feature_compiler.py.patch
+++ b/patches/tools-json_schema_compiler-feature_compiler.py.patch
@@ -1,14 +1,18 @@
 diff --git a/tools/json_schema_compiler/feature_compiler.py b/tools/json_schema_compiler/feature_compiler.py
-index fbfcf575a59d33ca311b0feb526a62dafbbdbd0a..02b369286e05a1724c8b90f383ad1bba47e281f0 100644
+index fbfcf575a59d33ca311b0feb526a62dafbbdbd0a..7af070c9e0166c50f2991402742cb31228b74af1 100644
 --- a/tools/json_schema_compiler/feature_compiler.py
 +++ b/tools/json_schema_compiler/feature_compiler.py
-@@ -647,6 +647,9 @@ class FeatureCompiler(object):
+@@ -647,6 +647,13 @@ class FeatureCompiler(object):
                    abs_source_file)
          raise
        dupes = set(f_json) & set(self._json)
 +      dupes.discard('topSites')
 +      dupes.discard('extension.inIncognitoContext')
 +      dupes.discard('bookmarks')
++      dupes.discard('sockets')
++      dupes.discard('sockets.tcp')
++      dupes.discard('sockets.udp')
++      dupes.discard('sockets.tcpServer')
        assert not dupes, 'Duplicate keys found: %s' % list(dupes)
        self._json.update(f_json)
  
diff --git a/tsconfig.json b/tsconfig.json
index c9d5db026076..ef02f72f325b 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -5,7 +5,8 @@
     "module": "commonjs",
     "lib": [
       "es6",
-      "dom"
+      "dom",
+      "es7"
     ],
     "target": "es5",
     "allowJs": true,