Examine source code of Live editor for CSS, Less & Sass - Magic CSS

{
  "version": "8.10.2",
  "manifest_version": 2,
  "author": "Priyank Parashar",
  "default_locale": "en",
  "name": "__MSG_Extension_Name__",
  "description": "__MSG_Extension_Description__",
  "homepage_url": "https://github.com/webextensions/live-css-editor",
  "icons": {
    "16": "icons/icon-16.png",
    "24": "icons/icon-24.png",
    "32": "icons/icon-32.png",
    "40": "icons/icon-40.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png",
    "256": "icons/icon-256.png"
  },
  "permissions": [
    "activeTab",
    "storage",
    "unlimitedStorage",
    "webNavigation",
    "<all_urls>"
  ],
  "optional_permissions": [],
  "browser_action": {
    "default_icon": {
      "16": "icons/icon-16.png",
      "24": "icons/icon-24.png",
      "32": "icons/icon-32.png",
      "40": "icons/icon-40.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png",
      "256": "icons/icon-256.png"
    }
  },
  "background": {
    "page": "background-magicss.html"
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Alt+Shift+C"
      }
    }
  },
  "options_ui": {
    "page": "options.html",
    "chrome_style": true
  },
  "applications": {
    "gecko": {
      "id": "{a42eb16c-2fab-4c06-b1f3-5f15adebb0e3}",
      "strict_min_version": "48.0"
    }
  }
}