365887 - [Mac OS X] Toolbar dropdown menus appear on the primary screen of a multi-screen set-up, regardless of browser position

Status: VERIFIED DUPLICATE of bug 314279

(Firefox :: Toolbars and Customization, defect)

Description

[Dan S.]

User-Agent:       Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en-US; rv:1.8.1.1) Gecko/20061204 Firefox/2.0.0.1
Build Identifier: Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en-US; rv:1.8.1.1) Gecko/20061204 Firefox/2.0.0.1

With Firefox 2.0.0.1 in Mac OS X 10.4.8, on a Mac with a desktop spanning two screens, if the browser window is on the secondary screen and I try to open a dropdown menu from a toolbar, the dropdown menu appears on the primary screen, along the edge closest to the browser window.

This applies to the Back button dropdown menu, as well as dropdown menus from thrid-party toolbars like the del.icio.us toolbar and the Web Developer toolbar.

In my case, I'm using a MacBook Pro (17") with the external monitor as the primary screen, and the laptop's monitor as the secondary screen.


Reproducible: Always

Steps to Reproduce:
1. Install Firefox 2.0.0.1 on a MacBook Pro with an external monitor connected and the desktop spanning both monitors.
2. Open the browser window, and move it to the secondary monitor (the monitor without the menu bar on top).
3. Visit a few web pages to populate the Back button dropdown menu.
4. Click on the Back button dropdown menu.  The menu will appear on the primary monitor, even though the browser window is on the secondary monitor.

Actual Results:  
The dropdown menu appeared on the edge of the primary display, at what appear to be the correct vertical coordinates but incorrect horizontal coordinates.

Expected Results:  
The dropdown menu should have appeared properly aligned under the Back button, regardless of the location of the browser window.