Examine source code of YouTube Mobile Redirector

{
  "manifest_version": 2,
  "name": "YouTube Mobile Redirector",
  "version": "1.0",
  "description": "Force YouTube to mobile version",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "storage",
    "*://*.youtube.com/*",
    "*://youtube.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_icon": {
      "48": "icon.png"
    },
    "default_title": "YouTube Mobile",
    "default_popup": "popup.html"
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "youtube-mobile@IamJony",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}