Examine source code of Water Intake Reminder

{
  "manifest_version": 2,
  "name": "Water Intake Reminder",
  "version": "1.0",
  "description": "Remind yourself to drink water at regular intervals throughout the day.",
  "permissions": [
    "alarms",
    "notifications"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icons/icon.png"
  },
  "icons": {
    "48": "icons/icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ad4883fc-1224-40bb-826a-1b579fddfecb}"
    }
  }
}