Examine source code of SERP Keyword Extractor by searchanalyzer.io

{
  "manifest_version": 2,
  "version": "2.1",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/logo.png",
    "default_title": "SERP Keyword Extractor by searchanalyzer.io"
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Period",
        "mac": "Command+Period"
      }
    }
  },
  "content_scripts": [
    {
      "js": [
        "content-script.js"
      ],
      "matches": [
        "*://*/*"
      ],
      "include_globs": [
        "*://*google.*/*",
        "*://*bing.*/*"
      ],
      "run_at": "document_idle"
    }
  ],
  "description": "SERP Keyword Extractor simplifies your keyword research. Extract keyword suggestions and questions directly from Google or Bing.",
  "homepage_url": "https://www.searchanalyzer.io/serp-keyword-extractor-plugin",
  "icons": {
    "48": "icons/logo-48.png",
    "96": "icons/logo-96.png"
  },
  "name": "SERP Keyword Extractor by searchanalyzer.io",
  "permissions": [
    "notifications",
    "clipboardWrite"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{680e5929-03b8-4a8c-8f3f-27420a73bafd}"
    }
  }
}