Examine source code of Reload on Idle

{
  "manifest_version": 2,
  "name": "Reload on Idle",
  "version": "2.2resigned1",
  "description": "__MSG_description__",
  "default_locale": "en",
  "permissions": [
    "alarms",
    "idle",
    "tabs",
    "storage",
    "<all_urls>"
  ],
  "options_ui": {
    "page": "options/options.html"
  },
  "background": {
    "scripts": [
      "/common/Configs.js",
      "/common/common.js",
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "reload-on-idle@clear-code.com"
    }
  }
}