Examine source code of Curriculum Icon

{
  "manifest_version": 2,
  "name": "Curriculum Icon",
  "version": "1.0",
  "description": "Curriculum icons are commonly used for educational applications or materials, LMS systems, learning planners, or training courses.",
  "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": "{2ce3f40a-c7c9-4d4a-9f76-e4a319aaf388}"
    }
  }
}