Examine source code of Glassdoor Unlocker

{
  "author": "Alex Turner",
  "name": "Glassdoor Unlocker",
  "description": "Bypass most login and contribution barriers on Glassdoor.",
  "version": "1.3",
  "manifest_version": 3,
  "browser_specific_settings": {
    "gecko": {
      "id": "{838884f6-9843-4d3f-9b2c-b4aec24d26ff}"
    }
  },
  "icons": {
    "32": "icon.svg",
    "48": "icon.svg",
    "96": "icon.svg",
    "128": "icon.svg"
  },
  "content_scripts": [
    {
      "js": [
        "unlock.js"
      ],
      "run_at": "document_end",
      "matches": [
        "*://*.glassdoor.com/*",
        "*://*.glassdoor.com.ar/*",
        "*://*.glassdoor.com.au/*",
        "*://*.glassdoor.be/*",
        "*://*.glassdoor.com.br/*",
        "*://*.glassdoor.ca/*",
        "*://*.glassdoor.de/*",
        "*://*.glassdoor.es/*",
        "*://*.glassdoor.fr/*",
        "*://*.glassdoor.com.hk/*",
        "*://*.glassdoor.co.in/*",
        "*://*.glassdoor.ie/*",
        "*://*.glassdoor.it/*",
        "*://*.glassdoor.com.mx/*",
        "*://*.glassdoor.nl/*",
        "*://*.glassdoor.co.nz/*",
        "*://*.glassdoor.at/*",
        "*://*.glassdoor.ch/*",
        "*://*.glassdoor.sg/*",
        "*://*.glassdoor.co.uk/*"
      ]
    }
  ]
}