Examine source code of Quality icon

{
  "manifest_version": 2,
  "name": "Quality icon",
  "version": "1.0",
  "description": "A quality symbol is often understood as an image, symbol or logo representing a product or service that meets high standards or is certified by a reputable organization.",
  "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": "{11400913-f0f2-4572-92c0-1628af0cb86e}"
    }
  }
}