Examine source code of resume-ai-agent-ats

{
  "manifest_version": 3,
  "name": "Resume AI Agent: ATS & Cover Letter",
  "short_name": "Resume AI Agent",
  "version": "1.0.0",
  "description": "Auto-grab job descriptions from LinkedIn, Naukri & Indeed. Optimize your resume for ATS, generate cover letters, and get ATS scores — powered by Google Gemini AI. Free forever.",
  "author": "Braj Bhushan Kumar",
  "homepage_url": "https://www.linkedin.com/in/braj-bhushan-kumar-30a022267",
  "browser_specific_settings": {
    "gecko": {
      "id": "resume-ai-agent@brajbhushankumar",
      "strict_min_version": "128.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "permissions": [
    "storage",
    "activeTab",
    "scripting",
    "tabs"
  ],
  "host_permissions": [
    "https://generativelanguage.googleapis.com/*",
    "https://www.linkedin.com/*",
    "https://www.naukri.com/*",
    "https://wellfound.com/*",
    "https://*.indeed.com/*"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "Resume AI Agent",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "96": "icons/icon96.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "96": "icons/icon96.png",
    "128": "icons/icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.linkedin.com/jobs/*",
        "https://www.linkedin.com/job/*",
        "https://www.naukri.com/*",
        "https://wellfound.com/jobs/*",
        "https://*.indeed.com/viewjob*",
        "https://*.indeed.com/rc/clk*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ]
}