How to call Firefox printpreview via url (not getMostRecentBrowserWindow) using addon SDK

问题

One way I can call printpreview is with getMostRecentBrowserWindow

const { getMostRecentBrowserWindow } = require('sdk/window/utils');
var chromewin = getMostRecentBrowserWindow();
chromewin.PrintUtils.printPreview(chromewin.PrintPreviewListener);

Now i want to call printpreview with url. Please help me. Thank you so much.

来源：https://stackoverflow.com/questions/22728166/how-to-call-firefox-printpreview-via-url-not-getmostrecentbrowserwindow-using