Examine source code of ATM icon

{
  "manifest_version": 2,
  "name": "ATM icon",
  "version": "1.0",
  "description": "The ATM icon often appears in banking apps, maps, or financial services, to indicate the location of an automated teller machine.",
  "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": "{9f2b1811-c5d8-47f4-9241-3963427b4a5f}"
    }
  }
}