Examine source code of Download video TK Plus

{
  "name": "Download video TK Plus",
  "description": "Download TK videos without watermark. Best TK video downloader.",
  "manifest_version": 2,
  "version": "1.0.23.9",
  "default_locale": "en",
  "content_scripts": [
    {
      "matches": [
        "https://tiktok.com/*",
        "https://www.tiktok.com/*",
        "https://denote.net/*"
      ],
      "js": [
        "content-script/index.js"
      ],
      "css": [
        "content-script/index.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    "assets/*",
    "content-script/inject.js",
    "content-script/index.js",
    "content-script/index.css",
    "popup/index.html"
  ],
  "background": {
    "scripts": [
      "background/index.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup/index.html"
  },
  "icons": {
    "16": "icon/128.png",
    "32": "icon/128.png",
    "48": "icon/128.png",
    "128": "icon/128.png",
    "300": "icon/128.png",
    "500": "icon/128.png"
  },
  "permissions": [
    "downloads",
    "storage",
    "*://*.tiktok.com/*",
    "https://tiktok.com/*",
    "https://*.tiktokcdn.com/*",
    "https://*.tiktokv.com/*",
    "https://*.musical.ly/*",
    "*://*.aliyuncs.com/*",
    "*://*.denote.net/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{39e886d1-2ceb-49fc-b895-7ba182ab8b30}"
    }
  }
}