Examine source code of Figma to CSS Exporter

{
  "manifest_version": 3,
  "name": "Figma to CSS Exporter",
  "short_name": "Figma to CSS",
  "version": "1.0.0",
  "description": "Extracts CSS properties from selected Figma elements and copies production-ready CSS to clipboard",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "host_permissions": [
    "https://www.figma.com/design/*",
    "https://www.figma.com/file/*"
  ],
  "background": {
    "scripts": [
      "background/service-worker.js"
    ]
  },
  "action": {
    "default_popup": "popup/popup.html",
    "default_title": "Figma to CSS Exporter",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.figma.com/design/*",
        "https://www.figma.com/file/*"
      ],
      "js": [
        "content/content.js"
      ],
      "css": [
        "content/content.css"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ],
  "options_page": "options/options.html",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "figma_css_exporter@forgex.aevorn",
      "strict_min_version": "109.0"
    }
  }
}