Examine source code of Time Goal Tracker

{
  "manifest_version": 2,
  "name": "Time Goal Tracker",
  "version": "1.0",
  "description": "Set time goals and receive notifications",
  "icons": {
    "48": "icon.png"
  },
  "permissions": [
    "storage",
    "notifications",
    "alarms"
  ],
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "Time Goal Tracker",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c84ef4e9-5a69-401c-9baa-eb621d080d98}"
    }
  }
}