User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-GB; rv:1.9.1.1) Gecko/20090715 Firefox/3.5.1 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-GB; rv:1.9.1.1) Gecko/20090715 Firefox/3.5.1 Aero Snap it is a new feature of Windows 7 that can be used to manage windows in the Windows operating system. It can for example be used to move windows to the right or left side of the screen to resize them automatically so that they fit half the screen of the computer monitor. This functionality can also controlled using Win+Cursor Left, Win+Cursor Right, Win+Cursor Up and Win+Cursor Down. The problem is that Firefox does not remember the new Window Size and Position resulting from using AeroSnap after minimizing the window but uses the Window Size and Position that was in effect before using AeroSnap when restoring a minimized window. Reproducible: Always Steps to Reproduce: 1. Open Firefox and and drag the Window to the center of the screen 2. Press Windows Key + Cursor Left to AeroSnap the Window to the Left Screen Edge 3. Click the Firefox Icon in the Windows 7 Taskbar to minimize the Window 4. Click the Firefox Icon in the Windows 7 Taskbar again to restore the Window 5. The window will be restored to the center of the screen instead vertically maximized and aligned with the left screen edge

This is now fixed on trunk (Firefox 3.6). I don't know what fixed this, and if it's trivial/safe enough to get backported to branch.

CC'ing Jim who did the fix on trunk

(In reply to comment #2) > CC'ing Jim who did the fix on trunk Hasn't landed yet!