Examine source code of ViewGrip: For YouTube

{
  "manifest_version": 2,
  "name": "ViewGrip - For YouTube",
  "author": "ViewGrip Group",
  "version": "5.5.4",
  "homepage_url": "https://www.viewgrip.net",
  "description": "Add-ons To promote YouTube videos for free, get more views and likes safely.",
  "icons": {
    "16": "assets/img/icon-16.png",
    "32": "assets/img/icon-32.png",
    "48": "assets/img/icon-48.png",
    "128": "assets/img/icon-128.png"
  },
  "permissions": [
    "history",
    "<all_urls>",
    "storage",
    "activeTab",
    "tabs",
    "webNavigation",
    "webRequest",
    "webRequestBlocking"
  ],
  "browser_action": {
    "default_icon": {
      "19": "assets/img/icon-19.png",
      "38": "assets/img/icon-38.png"
    },
    "default_title": "ViewGrip for Youtube"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "assets/js/plugins/jquery-3.6.0.js",
        "assets/js/core/Start.js",
        "assets/js/core/Main.js",
        "assets/js/core/Human.js",
        "assets/js/core/Settings.js",
        "assets/js/core/Signature.js"
      ],
      "run_at": "document_start"
    }
  ],
  "background": {
    "scripts": [
      "assets/background.js"
    ],
    "persistent": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "support@viewgrip.net"
    }
  }
}