1495505 - When the Firefox window is dragged from the rightmost monitor to the corner of another monitor, triggering Aero Snap, the window goes black.

Status: RESOLVED WORKSFORME

(Firefox :: Untriaged, defect)

Description

[DragonicZero]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:62.0) Gecko/20100101 Firefox/62.0
Build ID: 20180920131237

Steps to reproduce:

I can reproduce the bug following these steps:

1. Have a laptop set up with 3 external monitors.
  - The laptop is using Windows 10 Enterprise as its operating system.
  - The display is set up to show only in the 3 external monitors, not in the laptop monitor.
  - The 3 external monitors are set up in the following order, from left to right 4, 3, 2, 1.
  - Monitor 1 is the laptop monitor and it is set up in display settings as "Disconnect this display".
  - The other monitors are set as "Extend desktop to this display" (all in landscape orientation and at the recommended resolution).
  - Monitor 3 is set as the main display.
2.  Start Firefox by clicking on the Firefox icon pinned to the taskbar.
3. Drag the Firefox window to the rightmost monitor (monitor 2).
4. Drag the Firefox window from monitor 2 to any of the sides, corners or the top of either the leftmost or the center monitor (monitor 4 or 3), so that Aero Snap docks or maximizes the window on that monitor.
5. The Firefox window should now be completely black.

NOTES: 
 - The problem can be reproduced using a new firefox profile without any changes.
 - The problem can be reproduced on the latest Nightly (Build ID 20181001100147).




Actual results:

The Firefox window went black after dragging it from the rightmost monitor into the corner of any other monitor, triggering Aero Snap. This was in a 3-monitor setup


Expected results:

The window should've remained visible.

Comment 1

[Daniel_A[:daschilean] [Please contact - [e-mail]]]

Can you please test this in safe mode? Here is a link that can help you: https://goo.gl/AR5o9d.
I think it will be a good idea to retest this on the latest Firefox Nightly. Here is a link form where you can download it: https://nightly.mozilla.org. 
If you still have the issue please create a new profile, you have the steps here: https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles?redirectlocale=en-US&redirectslug=Managing-profiles#w_starting-the-profile-manager

Comment 2

[Daniel_A[:daschilean] [Please contact - [e-mail]]]

Hi,
Marking this as Resolved: Incomplete due to the lack of response from the DragonicZero.
If the issue is still reproducible with the latest Firefox version, feel free to reopen the bug.

Comment 3

[DragonicZero]

Hi,
Sorry for not responding on time. I've been busy with work and forgot to reply.
I did notice that the issue also happens with some other applications. SQL Server Manager, for example, does the same thing. So it may be because of a display driver or a Windows bug. Not a Firefox issue.

Thanks for your time.

Comment 4

[Daniel_A[:daschilean] [Please contact - [e-mail]]]

Hi DragonicZero,

Based on Comment3 I will mark this as Resolved-WFM.