Examine source code of Shopify Dev Tools

{
  "manifest_version": 2,
  "name": "Shopify Dev Tools",
  "version": "1.3.3",
  "description": "Add options to Shopify website frontend to easily manage the various Shopify development related tasks.",
  "icons": {
    "16": "/icons/icon_16x16.png",
    "48": "/icons/icon_48x48.png",
    "128": "/icons/icon_128x128.png"
  },
  "content_scripts": [
    {
      "js": [
        "/src/shopify-tools.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b47ac93f-62dc-4d65-be48-a105076786c4}"
    }
  }
}