Examine source code of Image Compressor Pro

{
  "manifest_version": 3,
  "name": "Image Compressor Pro",
  "version": "1.0",
  "description": "Professional batch image compression with drag & drop support",
  "permissions": [
    "activeTab"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "Image Compressor Pro"
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "image-compressor-pro@extension.local"
    }
  }
}