Examine source code of Take a Break

{
  "manifest_version": 2,
  "name": "Take a Break",
  "version": "0.1.1resigned1",
  "permissions": [
    "notifications",
    "alarms",
    "menus"
  ],
  "icons": {
    "32": "icons/icon_32.png",
    "48": "icons/icon_48.png"
  },
  "browser_action": {
    "default_icon": "icons/icon_32.png",
    "default_title": "Time to take a break!",
    "default_popup": "popup/index.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{925d2b71-1bcb-4ece-93e4-d0f388518204}"
    }
  }
}