1130385 - Black rectangles randomly appear over content in Firefox 35 and then disappear.

Status: RESOLVED WORKSFORME

(Firefox :: Untriaged, defect)

Description

[Stefan]

Attachment: Black_Rectange_FF35.png

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:35.0) Gecko/20100101 Firefox/35.0
Build ID: 20150122214805

Steps to reproduce:

Quite difficult to reproduce, but sometimes quite frequent, seeming to only effect certain long pages with lots of content. Go to a such a page, like 
https://en.wikipedia.org/wiki/Number
and scroll up and down the page quite fast using the scroll wheel.




Actual results:

Occasionally, black rectangles of various sizes randomly appear over parts of content (see attached image) and then disappear almost immediately as you continue to scroll, but on occasion they can persist for a few seconds and then disappear.

This is unique to V35. I have never seen such behavior on earlier versions.


Expected results:

No black rectangles. 

See also the following report of what appears to be the same issue:
http://support.pixelentity.com/threads/12365-Black-rectangle-randomly-flashing-on-homepage-in-Firefox-v35

Comment 1

[Stefan]

Added Feb 7 2014:  Sometimes the black rectangles persist and do not go away until the widow loses and regains focus, as happened to me today on the w2schools.com page as shown in the graphic:

http://www.zweigmedia.com/BlackBox2.png

Comment 2

[Stefan]

Problem goes away by disabling graphics acceleration; likely a compatibility issue with the graphics card: AMD Radeon HD 6770M 512 MB

Comment 3

[ovidiu boca[:Ovidiu]]

Based on comment 2 this bug will be marked as Resolved: WFM.
Reporter please fell free to reopen this if you still have this issue.
Thank you.