Examine source code of Prettier Guten

{
  "version": "0.0.5",
  "name": "Prettier",
  "manifest_version": 2,
  "description": "Run Prettier in your browser!",
  "homepage_url": "https://prettier.io",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "commands": {
    "run-prettier-format": {
      "suggested_key": {
        "default": "Ctrl+Shift+Comma",
        "mac": "Command+Shift+Comma"
      },
      "description": "Format using Prettier"
    }
  },
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "applications": {
    "gecko": {
      "id": "@prettier",
      "strict_min_version": "54.0"
    }
  }
}