Examine source code of Shopify Detector

{
  "manifest_version": 2,
  "name": "Shopify Detector",
  "version": "2.0",
  "description": "Detects Shopify websites and displays a UI badge",
  "icons": {
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "permissions": [
    "<all_urls>",
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{9773f66a-9b50-4a05-be62-cf02c4f44adc}"
    }
  }
}