diff --git a/config.js b/config.js
index a883684613f6..9a297bcd1047 100644
--- a/config.js
+++ b/config.js
@@ -44,9 +44,6 @@ var config = {
     //
 
     testing: {
-        // Enables experimental simulcast support on Firefox.
-        enableFirefoxSimulcast: false,
-
         // P2P test mode disables automatic switching to P2P when there are 2
         // participants in the conference.
         p2pTestMode: false
diff --git a/package-lock.json b/package-lock.json
index 44eae3969df3..8519bd747d23 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10654,8 +10654,8 @@
       "integrity": "sha1-mGbfOVECEw449/mWvOtlRDIJwls="
     },
     "js-utils": {
-      "version": "github:jitsi/js-utils#0b2cef90613a74777fefd98d4ee3eda3879809ab",
-      "from": "github:jitsi/js-utils#0b2cef90613a74777fefd98d4ee3eda3879809ab",
+      "version": "github:jitsi/js-utils#df68966e3c65b5c57fcd2670da1326a2c77518d1",
+      "from": "github:jitsi/js-utils#df68966e3c65b5c57fcd2670da1326a2c77518d1",
       "requires": {
         "bowser": "2.7.0",
         "js-md5": "0.7.3",
@@ -10884,37 +10884,21 @@
       }
     },
     "lib-jitsi-meet": {
-      "version": "github:jitsi/lib-jitsi-meet#0d058e50633d62c7b26114418e234f4a8ae9a78e",
-      "from": "github:jitsi/lib-jitsi-meet#0d058e50633d62c7b26114418e234f4a8ae9a78e",
+      "version": "github:jitsi/lib-jitsi-meet#4870efe4593fdd2819d7a41ada835d1c26c292ab",
+      "from": "github:jitsi/lib-jitsi-meet#4870efe4593fdd2819d7a41ada835d1c26c292ab",
       "requires": {
         "@jitsi/sdp-interop": "1.0.1",
         "@jitsi/sdp-simulcast": "0.3.0",
         "async": "0.9.0",
         "current-executing-script": "0.1.3",
         "jitsi-meet-logger": "github:jitsi/jitsi-meet-logger#5ec92357570dc8f0b7ffc1528820721c84c6af8b",
-        "js-utils": "github:jitsi/js-utils#8567f86ec2774ae1d1c47b22e3435928cf5d9771",
+        "js-utils": "github:jitsi/js-utils#df68966e3c65b5c57fcd2670da1326a2c77518d1",
         "lodash.isequal": "4.5.0",
         "sdp-transform": "2.3.0",
         "strophe.js": "1.3.4",
         "strophejs-plugin-disco": "0.0.2",
         "strophejs-plugin-stream-management": "github:jitsi/strophejs-plugin-stream-management#e719a02b4f83856c1530882084a4b048ee622d45",
         "webrtc-adapter": "7.5.0"
-      },
-      "dependencies": {
-        "js-md5": {
-          "version": "0.7.3",
-          "resolved": "https://registry.npmjs.org/js-md5/-/js-md5-0.7.3.tgz",
-          "integrity": "sha512-ZC41vPSTLKGwIRjqDh8DfXoCrdQIyBgspJVPXHBGu4nZlAEvG3nf+jO9avM9RmLiGakg7vz974ms99nEV0tmTQ=="
-        },
-        "js-utils": {
-          "version": "github:jitsi/js-utils#8567f86ec2774ae1d1c47b22e3435928cf5d9771",
-          "from": "github:jitsi/js-utils#8567f86ec2774ae1d1c47b22e3435928cf5d9771",
-          "requires": {
-            "bowser": "2.7.0",
-            "js-md5": "0.7.3",
-            "postis": "2.2.0"
-          }
-        }
       }
     },
     "libflacjs": {
diff --git a/package.json b/package.json
index cee97a743983..7148765355c9 100644
--- a/package.json
+++ b/package.json
@@ -53,10 +53,10 @@
     "jquery-contextmenu": "2.4.5",
     "jquery-i18next": "1.2.1",
     "js-md5": "0.6.1",
-    "js-utils": "github:jitsi/js-utils#0b2cef90613a74777fefd98d4ee3eda3879809ab",
+    "js-utils": "github:jitsi/js-utils#df68966e3c65b5c57fcd2670da1326a2c77518d1",
     "jsrsasign": "8.0.12",
     "jwt-decode": "2.2.0",
-    "lib-jitsi-meet": "github:jitsi/lib-jitsi-meet#0d058e50633d62c7b26114418e234f4a8ae9a78e",
+    "lib-jitsi-meet": "github:jitsi/lib-jitsi-meet#4870efe4593fdd2819d7a41ada835d1c26c292ab",
     "libflacjs": "github:mmig/libflac.js#93d37e7f811f01cf7d8b6a603e38bd3c3810907d",
     "lodash": "4.17.13",
     "moment": "2.19.4",