Examine source code of Coffee cup icon

{
  "manifest_version": 2,
  "name": "Coffee cup icon",
  "version": "1.0",
  "description": "Coffee cup icon often used with Morning drink icon, alertness, relaxation, break.",
  "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": "{f45c0aa6-5791-463d-a609-e2f6edb548b2}"
    }
  }
}