Join MDN and developers like you at Mozilla's View Source conference, 12-14 September in Berlin, Germany. Learn more at

window.importDialog Redirect 1

« DOM Reference


Because opening windows on mobile isn't necessarily appropriate, the Firefox Mobile team designed the importDialog() method to replace window.openDialog(). Instead of opening a new window, it merges the specified XUL dialog into the main window.


newDialog = importDialog(aParent, aSrc, aArguments) 
The opened window
The dialog's parent; can be null.
The chrome URL of the XUL dialog.
A JavaScript object containing data to pass to the dialog.


var dialog = importDialog(null, "chrome://myextension/content/dialog.xul", myObject);


The XUL passed to importDialog() is very similar to XUL passed to window.openDialog(), with some limitations and caveats:

  • Only <dialog> top level elements are permitted.
  • Scripts are loaded via an attribute on the <dialog> element, not via the <script> tag.

The XUL is merged into the existing window, almost like a XUL overlay. Because of this, element ID and JavaScript conflicts are possible, just like overlays. So be careful.


DOM Level 0. Not part of any standard.

Document Tags and Contributors

 Last updated by: Sheppy,