Examine source code of Reminder application

{
  "manifest_version": 2,
  "name": "Reminder application",
  "version": "1.0",
  "description": "Reminder apps are a type of app commonly used to remember to-dos, appointments, or personal goals.",
  "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": "{c3199b07-1a79-427a-916c-c8fcc2391f0c}"
    }
  }
}