Examine source code of Simple Pomodoro Timer

{
  "name": "Pair Programming Timer Extension",
  "description": "A timer extension for switching roles during pair programming sessions.",
  "version": "1.0",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "icons": {
    "16": "images/logo16.png",
    "32": "images/logo32.png",
    "48": "images/logo48.png",
    "128": "images/logo128.png"
  },
  "permissions": [
    "storage",
    "alarms",
    "notifications"
  ],
  "browser_action": {
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "leslie.alldridge@gmail.com"
    }
  }
}