Examine source code of SelectorsHub Pro

{
  "manifest_version": 3,
  "name": "SelectorsHub Pro",
  "description": "__MSG_extDescription__",
  "author": "Sanjay Kumar",
  "homepage_url": "https://www.selectorshub.com/",
  "default_locale": "en",
  "version": "5.3.1",
  "devtools_page": "devtools-panel/devtools.html",
  "icons": {
    "48": "logo-48.png",
    "96": "logo-96.png",
    "128": "logo-128.png"
  },
  "action": {
    "default_title": "__MSG_extDefaultTitle__",
    "default_popup": "extension/popup.html"
  },
  "background": {
    "scripts": [
      "extension/background.js"
    ]
  },
  "permissions": [
    "tabs",
    "notifications",
    "storage",
    "contextMenus",
    "clipboardWrite",
    "cookies",
    "webNavigation"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "1f5Abaefec6c3Dfc12z91aCaFF46@selectorshub"
    }
  },
  "content_scripts": [
    {
      "run_at": "document_start",
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "content-script/contentScript.css"
      ],
      "js": [
        "content-script/dom-inspector.js",
        "content-script/contentScript.js",
        "content-script/playwrightnew.js"
      ],
      "all_frames": true,
      "match_about_blank": true
    }
  ]
}