Examine source code of Glassdoor Easy Access

{
  "manifest_version": 2,
  "name": "Glassdoor Easy Access",
  "version": "1.0",
  "description": "Bypass Glassdoor login wall",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "scripting",
    "tabs",
    "https://www.glassdoor.com/*",
    "https://www.glassdoor.co.uk/*",
    "https://www.glassdoor.ca/*",
    "https://www.glassdoor.de/*",
    "https://www.glassdoor.fr/*",
    "https://www.glassdoor.ie/*",
    "https://www.glassdoor.co.in/*",
    "https://www.glassdoor.com.au/*",
    "https://www.glassdoor.nl/*",
    "https://www.glassdoor.sg/*",
    "https://www.glassdoor.co.nz/*",
    "https://www.glassdoor.co.jp/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.glassdoor.com/*",
        "https://www.glassdoor.co.uk/*",
        "https://www.glassdoor.ca/*",
        "https://www.glassdoor.de/*",
        "https://www.glassdoor.fr/*",
        "https://www.glassdoor.ie/*",
        "https://www.glassdoor.co.in/*",
        "https://www.glassdoor.com.au/*",
        "https://www.glassdoor.nl/*",
        "https://www.glassdoor.sg/*",
        "https://www.glassdoor.co.nz/*",
        "https://www.glassdoor.co.jp/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{fbe4258b-8ce7-4eaa-9980-ac4ba416be3c}"
    }
  }
}