Examine source code of TikTok Video Saver

{
  "manifest_version": 3,
  "name": "TikTok Video Downloader — No Watermark",
  "short_name": "TikTok DL",
  "version": "1.0.0",
  "description": "Download TikTok videos without watermark in HD. Paste any TikTok link and save instantly. Fast, free, no login required.",
  "permissions": [
    "activeTab",
    "scripting",
    "storage",
    "downloads",
    "tabs",
    "contextMenus",
    "clipboardWrite",
    "clipboardRead"
  ],
  "host_permissions": [
    "https://www.tiktok.com/*",
    "https://vm.tiktok.com/*",
    "https://vt.tiktok.com/*",
    "https://bulkdl.com/*"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/16.png",
      "48": "icons/48.png",
      "128": "icons/128.png"
    },
    "default_title": "TikTok Video Downloader"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.tiktok.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "tiktok-downloader@bulkdl.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "icons": {
    "16": "icons/16.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  }
}