Examine source code of Task Tracker

{
  "manifest_version": 3,
  "name": "Task Tracker",
  "version": "1.0.2",
  "description": "Track time spent on your tasks.",
  "browser_specific_settings": {
    "gecko": {
      "id": "task-tracker@github.dzhmilka",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "icons/timer-16.png",
    "32": "icons/timer-32.png",
    "48": "icons/timer-48.png",
    "96": "icons/timer-96.png",
    "128": "icons/timer-128.png"
  },
  "action": {
    "default_icon": {
      "16": "icons/timer-idle-16.png",
      "32": "icons/timer-idle-32.png"
    },
    "default_title": "Task Tracker",
    "default_popup": "popup.html"
  },
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "permissions": [
    "storage"
  ]
}