Examine source code of Icon row

{
  "manifest_version": 2,
  "name": "Icon row",
  "version": "1.0",
  "description": "Shopping cart icons are often designed to represent shopping functionality in e-commerce websites or sales applications.",
  "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": "{ec6d3405-ad0e-411c-8d39-5e403fc46f1d}"
    }
  }
}