Examine source code of Comparison icon

{
  "manifest_version": 2,
  "name": "Comparison icon",
  "version": "1.0",
  "description": "The compare icon is an icon that represents the operation of comparing two objects, commonly used in word processing, image editing, file management, or e-commerce software.",
  "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": "{b1173d41-aadb-4bba-b895-c93b5f2412e4}"
    }
  }
}