B2G/gecko/browser/base/content/browser.js
/**
   * This accessor is used to support per-window Private Browsing mode.
   */
This accessor is used to support per-window Private Browsing mode.
This accessor is used to support per - window Private Browsing mode .
get privateWindow() {
    if (!gBrowser)
      return false;
    return gBrowser.docShell.QueryInterface(Ci.nsILoadContext)
                            .usePrivateBrowsing;
  }
get privateWindow ( ) { if ( ! gBrowser ) return false ; return gBrowser . docShell . QueryInterface ( Ci . nsILoadContext ) . usePrivateBrowsing ; }
This accessor is used to support per-window Private Browsing mode.
This accessor is used to support per - window Private Browsing mode .