Examine source code of Clear cart icon

{
  "manifest_version": 2,
  "name": "Clear cart icon",
  "version": "1.0",
  "description": "The Remove Cart icon is commonly used in e-commerce applications, shopping websites, or sales management software to allow users to remove products from the shopping cart.",
  "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": "{f47f885b-d4dd-40b6-9da7-f4526d17be02}"
    }
  }
}