Examine source code of Micro-Task Tracker

{
  "manifest_version": 3,
  "name": "Micro-Task Tracker",
  "version": "1.0",
  "description": "A simple task tracker with a 17-task limit.",
  "action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "permissions": [
    "storage"
  ],
  "icons": {
    "128": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "micro-task-tracker@zangerolame.com"
    }
  }
}