Examine source code of Free The Bird

{
  "manifest_version": 3,
  "name": "Free The Bird",
  "version": "1.0",
  "description": "",
  "content_scripts": [
    {
      "matches": [
        "https://twitter.com/*"
      ],
      "js": [
        "assets/content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "1e9128bbd1f7103e29795e40e05fe23391143047@if-you-know-you-know",
      "strict_min_version": "116.0"
    }
  },
  "host_permissions": [
    "*://*.twitter.com/*"
  ],
  "web_accessible_resources": [
    {
      "matches": [
        "https://twitter.com/*"
      ],
      "resources": [
        "assets/images/*.jpg",
        "assets/images/*.png"
      ]
    }
  ],
  "icons": {
    "16": "assets/icons/icon16-min.png",
    "32": "assets/icons/icon32-min.png",
    "48": "assets/icons/icon48-min.png",
    "128": "assets/icons/icon128-min.png"
  }
}