Examine source code of MindHero

{
  "description": "MindHero - Personal New Tab Page with Webtime Tracker, Pomodoro and To-Do.",
  "homepage_url": "https://github.com/nabendu82/Addons",
  "icons": {
    "64": "icons/icon.png"
  },
  "version": "2.0",
  "manifest_version": 2,
  "name": "MindHero",
  "permissions": [
    "alarms",
    "notifications"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "applications": {
    "gecko": {
      "strict_min_version": "55.0a2",
      "id": "{80d67c68-5004-4198-ace5-9ce41ddcd46f}"
    }
  }
}