Examine source code of ZabbixWatch

{
  "manifest_version": 2,
  "author": "Hikami",
  "name": "ZabbixWatch",
  "version": "1.1",
  "description": "Notifications from Zabbix in your Browser!",
  "icons": {
    "48": "icons/zabbixWatch-48.png"
  },
  "permissions": [
    "notifications",
    "storage"
  ],
  "background": {
    "page": "background/zabbixWatch_background.html",
    "persistent": true
  },
  "options_ui": {
    "page": "options/options.html",
    "browser_style": true,
    "open_in_tab": false
  },
  "browser_action": {
    "default_icon": {
      "48": "icons/zabbixWatch-48.png"
    },
    "default_title": "ZabbixWatch",
    "default_popup": "popup/overview.html"
  }
}