365659 - FireFox toolbar and Bookmarks Toolbar menus not rendering in correct position using secondary screen

Status: RESOLVED DUPLICATE of bug 314279

(Firefox :: Shell Integration, defect)

Description

[kieran_lists]

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

When a FireFox window is moved to the secondary screen after plugging in a second monitor, clicking on toolbar and bookmarks toolbar menus causes them to be drawn in the primary screen.

Reproducible: Always

Steps to Reproduce:
1. Start Firefox on a single display (aka monitor/screen) Mac (for example a MacBook Pro). Call this display #1
2. Plus in a second large display (display #2) into the Mac or MacBook where the second display is set to be the main display having the system menu.
3. Now move a FireFox window to the display #1 (which is not the secondary display and does not have the OS menu)
4. Click on any toolbar or bookmarks bar menu item

Actual Results:  
The popup menu appears floating on the main display

Expected Results:  
The popup menu should appear right under the clicked menu item as it normally does when no second display has been added.

A workaround is to restart FireFox AFTER a second display has been plugged into the Mac. Then the menus work as normal.
I am guessing that FireFox needs to perform some internal task when a change to the display configuration is performed while the FireFox app is running.