Examine source code of Telegram Downloader

{
  "name": "Telegram Downloader",
  "description": "Allow download telegram media from channels or groups with media protection",
  "version": "1.8.3",
  "short_name": "Tg Downloader",
  "manifest_version": 2,
  "permissions": [
    "activeTab",
    "tabs",
    "webRequest",
    "webRequestBlocking",
    "https://web.telegram.org/k",
    "webRequestFilterResponse",
    "downloads",
    "storage",
    "http://*/*",
    "https://*/*"
  ],
  "icons": {
    "16": "16x16.png",
    "48": "48x48.png",
    "128": "128x128.png",
    "256": "256x256.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.web.telegram.org/*"
      ],
      "js": [
        "content_script.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Telegram downloader",
    "default_icon": {
      "48": "48x48.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c9cc7f63-4549-4d7a-a77a-931bfdeb09a9}"
    }
  }
}