Examine source code of Mindfulness Reminder

{
  "manifest_version": 2,
  "name": "Mindfulness Reminder",
  "version": "1.0",
  "description": "Set reminders to take mindful breaks for breathing, stretching, or meditation.",
  "icons": {
    "48": "icons/mindfulness-icon-48.png"
  },
  "permissions": [],
  "browser_action": {
    "default_icon": "icons/mindfulness-icon-48.png",
    "default_popup": "popup.html",
    "default_title": "Mindfulness Reminder"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{de3a98eb-150a-44e9-ad39-dcf3f0669c12}"
    }
  }
}