Examine source code of Brick Wall Icon

{
  "manifest_version": 2,
  "name": "Brick Wall Icon",
  "version": "1.0",
  "description": "The brick wall symbol represents a foundation that is built solidly step by step – in line with themes of development and building the future.",
  "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": "{66a564a2-e647-4ecb-a3a9-ad9d5fda98b0}"
    }
  }
}