Examine source code of OptiBreak

{
  "manifest_version": 3,
  "name": "OptiBreak",
  "version": "0.3.0",
  "description": "Sends a notification every 20 minutes to look away at an object 20 feet away for 20 seconds.",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "notifications",
    "alarms",
    "storage"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "128": "icon128.png"
    }
  },
  "options_page": "options.html",
  "icons": {
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "optibreak@edwudw.com",
      "strict_min_version": "109.0"
    }
  }
}