Examine source code of Shopify Metafield Groups

{
  "manifest_version": 3,
  "name": "Shopify Metafield Groups",
  "version": "2.8",
  "browser_specific_settings": {
    "gecko": {
      "id": "metafield-groups@blinkseo.co.uk",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "description": "Visually organise metafields in your Shopify admin by grouping related fields together with colour-coded labels.",
  "permissions": [
    "storage",
    "tabs"
  ],
  "host_permissions": [
    "https://admin.shopify.com/*",
    "https://*.myshopify.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://admin.shopify.com/*",
        "https://*.myshopify.com/admin/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "injected.css"
      ]
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  }
}