Examine source code of Beer cup icon

{
  "manifest_version": 2,
  "name": "Beer cup icon",
  "version": "1.0",
  "description": "The beer mug symbol is an emoji or image that often carries meanings associated with relaxation, partying, celebrating, or alcoholic beverages, especially beer.",
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html",
    "default_title": "Click me!"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{17d786aa-6669-4c59-af96-e71a412a99e0}"
    }
  }
}