Examine source code of Version Diff Checker Pro

{
  "manifest_version": 2,
  "name": "Version Diff Checker Pro",
  "version": "1.3",
  "description": "Advanced diff checker with side-by-side view, dark mode, and export options.",
  "icons": {
    "32": "icons/logo_32.png",
    "64": "icons/logo_64.png",
    "128": "icons/logo_128.png"
  },
  "permissions": [
    "storage",
    "activeTab",
    "clipboardWrite",
    "downloads"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Version Diff Checker Pro"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{fb62f0bd-d17e-4998-a8f8-c50281dbfb1c}"
    }
  }
}