Examine source code of X Video Downloader

{
  "manifest_version": 3,
  "name": "X Video Downloader",
  "version": "0.3.0",
  "description": "One-click download of X/Twitter videos to your computer. Adds a download button to every tweet's action bar.",
  "browser_specific_settings": {
    "gecko": {
      "id": "x-video-downloader@local",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "action": {
    "default_title": "X Video Downloader",
    "default_popup": "src/popup/popup.html",
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png",
      "128": "icons/icon-128.png"
    }
  },
  "permissions": [
    "downloads",
    "storage",
    "notifications"
  ],
  "host_permissions": [
    "https://x.com/*",
    "https://twitter.com/*",
    "https://*.twimg.com/*"
  ],
  "background": {
    "scripts": [
      "src/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://x.com/*",
        "https://twitter.com/*"
      ],
      "js": [
        "src/lib/media.js",
        "src/injected.js"
      ],
      "world": "MAIN",
      "run_at": "document_start",
      "all_frames": false
    },
    {
      "matches": [
        "https://x.com/*",
        "https://twitter.com/*"
      ],
      "js": [
        "src/lib/media.js",
        "src/content.js"
      ],
      "css": [
        "src/content.css"
      ],
      "run_at": "document_start",
      "all_frames": false
    }
  ]
}