Examine source code of Open Website Addon

{
  "manifest_version": 2,
  "name": "Open Website Addon",
  "version": "1.0",
  "description": "Addon mở nhanh website yêu thích chỉ bằng 1 click.",
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon.png"
    }
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9997fd23-c50a-4c07-ba7a-32cba3e2b0a5}"
    }
  }
}