Examine source code of X.com Animated Profiles

{
  "manifest_version": 3,
  "name": "X.com Animated Profiles",
  "version": "0.5.8",
  "description": "Allows users to see and set animated GIF profile pictures (multiple sizes) and banners on x.com.",
  "browser_specific_settings": {
    "gecko": {
      "id": "xanimated@llmnn.com"
    }
  },
  "permissions": [
    "storage",
    "scripting"
  ],
  "host_permissions": [
    "https://x.com/*",
    "https://twitter.com/*",
    "https://xanimated.llmnn.com/*"
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://x.com/*",
        "https://twitter.com/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "styles.css"
      ],
      "run_at": "document_idle"
    }
  ]
}