Examine source code of X Follower Tracker

{
  "manifest_version": 3,
  "name": "X Follower Tracker",
  "version": "1.1.0",
  "description": "Track your X/Twitter followers and detect who unfollowed you.",
  "permissions": [
    "storage",
    "activeTab"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "X Follower Tracker"
  },
  "content_scripts": [
    {
      "matches": [
        "*://x.com/*",
        "*://twitter.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "xfollower-tracker@example.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  }
}