1346989 - Black screen flickering in Mac in Full Screen view

Status: RESOLVED WORKSFORME

(Core :: Graphics, defect, P3)

Description

[galtenberg]

Attachment: Offscreen Firefox, causes flickering.png

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:52.0) Gecko/20100101 Firefox/52.0
Build ID: 20170302120751

Steps to reproduce:

1. Open Firefox in Mac OS Sierra
2. Open a few tabs
3. Change the View to Full Screen
4. Use other apps for awhile
5. Return to Firefox, see leftmost tab is offscreen (see attached screenshot)
6. Tab adjusts itself
7. Within a minute, Mac screen starts flickering to blank screen badly, even when cmd-tabbing to other apps
8. Exit Full Screen on Firefox to fix the issue

Try steps 4 and 5 repeatedly until returning to app shows tabs offscreen.


Actual results:

Using Firefox on Mac OS Sierra periodically causes the screen to flicker badly, even in other apps.

I believe this is correlated to a problem with the application painting off the allowed canvas.

Present since at least version 50.

Could be related to issues:
* 1275290
* 1336797


Expected results:

Firefox should function in Full Screen view normally, without full screen flickers.

Comment 1

[galtenberg]

This seems much more stable in Sierra 10.12.4, haven't experienced again since upgrade.

Comment 2

[Kelsey Gilbert [:jgilbert]]

Any ideas, Jeff?

Comment 3

[Milan Sreckovic [:milan] (needinfo for best results)]

Resolving based on comment 1.