manifest.json

{
  "manifest_version": 3,
  "name": "Narrower",
  "version": "0.1",
  "description": "Adjust content width for ultra-wide monitors. Icon credits: Data merge icons created by Fuzzee - Flaticon",
  "permissions": ["storage", "activeTab", "scripting", "tabs"],
  "host_permissions": ["<all_urls>"],
  "content_scripts": [
    {
      "matches": ["<all_urls>"],
      "js": ["content.js"],
      "run_at": "document_start"
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "images/icon16.png",
      "48": "images/icon48.png",
      "128": "images/icon128.png"
    }
  },
  "icons": {
    "16": "images/icon16.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "background": {
    "service_worker": "background.js"
  },
  "commands": {
    "increase-width": {
      "suggested_key": {
        "default": "Ctrl+Shift+Right",
        "mac": "Command+Shift+Right"
      },
      "description": "Increase content width",
      "global": true
    },
    "decrease-width": {
      "suggested_key": {
        "default": "Ctrl+Shift+Left",
        "mac": "Command+Shift+Left"
      },
      "description": "Decrease content width",
      "global": true
    },
    "toggle-narrower": {
      "suggested_key": {
        "default": "Ctrl+Shift+Space",
        "mac": "Command+Shift+Space"
      },
      "description": "Toggle Narrower on/off",
      "global": true
    }
  }
}