1160826 - Incorrect redraw when maximized and switching monitors with keyboard

Status: UNCONFIRMED

(Core :: Graphics, defect, P3)

Description

[cp.engr0]

Attachment: Firefox 37.0.2 bug - redraw maximized.png

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:37.0) Gecko/20100101 Firefox/37.0
Build ID: 20150415140819

Steps to reproduce:

Platform: Win 7 Pro x64 w/ SP1
Dual monitor setup, both same size, side-by-side
Firefox 37.0.2
Tried with a separate "clean" profile (no add-ons).

1. Maximize Firefox on the monitor without the taskbar.
2. With that Firefox window in-focus, move it to the other monitor using Win+Shift+<Left Arrow>, or Win+Shift+<Right Arrow>.


Actual results:

Firefox redraws incorrectly. It appears to be mostly ignoring the taskbar.

For my configuration, with the taskbar on the right-edge of the right screen, as shown in attached screenshot:

1. The window management buttons (maximize, minimize, restore) are roughly in the right places, but minimize and restore are greyed out.

2. The Navigation Bar, web page contents, and Bookmarks Toolbar (not shown) extend past where the window should end, to underneath the taskbar.

3. Not shown: If present, the vertical scrollbar is also hidden beneath the taskbar.

Different redraw issues occur when the taskbar is located elsewhere.


Expected results:

Firefox should account for the taskbar when it redraws while maximized.

Comment 1

[Sotaro Ikeda [:sotaro]]

cp.engr0, does the problem still happen? When I tried with different display on Win10, the problem did not happen.