Examine source code of Year Countdown Timer

{
  "manifest_version": 2,
  "name": "Year Countdown Timer",
  "version": "1.0.0",
  "description": "Professional countdown timer showing time left until the end of the year with secure search functionality",
  "homepage_url": "https://github.com/Zakariya-Zahid/year-countdown-firefox-extension",
  "developer": {
    "name": "Zakariya Zahid",
    "url": "https://github.com/Zakariya-Zahid"
  },
  "chrome_url_overrides": {
    "newtab": "dist/index.html"
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [],
  "content_security_policy": "script-src 'self'; object-src 'self'; style-src 'self' 'unsafe-inline';",
  "web_accessible_resources": [
    "dist/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{a7b8c9d0-e1f2-4567-8901-234567890def}",
      "strict_min_version": "78.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}