Examine source code of Freetube

{
  "name": "Freetube",
  "description": "Automatically open YouTube videos in Freetube.",
  "version": "4.9",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "icons": {
    "250": "freetube.png"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "contextMenus",
    "tabs",
    "*://*.youtube.com/*",
    "*://youtu.be/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*",
        "*://youtu.be/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "admin@gxvwb.dev",
      "data_collection_permissions": {
        "required": [
          "websiteContent"
        ],
        "feedback": false,
        "personalization": false,
        "performance": false
      }
    }
  }
}