719558 - Gif image behaves weird and gives smearing upon scrolling

Status: RESOLVED DUPLICATE of bug 689962

(Core :: Graphics, defect)

Description

[Jens]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:9.0.1) Gecko/20100101 Firefox/9.0.1
Build ID: 20111220165912

Steps to reproduce:

I'm using Fx 9.0.1 on Apple Snow Leopard 10.6.8
For example showing this image: http://ic.tweakimg.net/ext/i/thumbs_fpa_small/1326888421.gif
when opened in a new tab gives a 'screenshot' of the previous tab, instead of showing the gif.
Also the site: http://www.simplon.nl gives smearing upon scrolling.


Actual results:

The gif images behave weird.


Expected results:

The gif should be shown.

Comment 1

[Jens]

When browsing under Windows it works fine, OSX gives the problem.

Comment 2

[Tim (fmdeveloper)]

Does the issue still occur if you start Firefox in Safe Mode? http://support.mozilla.com/en-US/kb/Safe+Mode

Comment 3

[Jens]

Yes. I started Fx in safemode with all add-ons turned off, and it still behaves the same. 
I'll add some screenshots in a moment.

Comment 4

[Jens]

Attachment: The single gif file. Taken with Fx in safe mode, add-ons off.

Comment 5

[Jens]

Attachment: The second case. smearing upon scrolling.

Comment 6

[Tim (fmdeveloper)]

Please post the contents of the graphics section from about:suppport

Comment 7

[Jens]

Grafisch
Adapterbeschrijving:  0x24200,0x20400
WebGL-renderer:  Intel Inc. -- Intel GMA X3100 OpenGL Engine -- 2.0 APPLE-1.6.36
GPU-versnelde vensters:  0/1

Comment 8

[Tim (fmdeveloper)]

Jens -> Does this only happen with GIFs?

Matti -> Any ideas?

Comment 9

[Jens]

For as far as I came across this issue, yes. 
I did some testing and when I open and save the .gif file in PhotoShop, the issue is gone. But also the file size increased from 231 bytes to 49.670 bytes, so that is not a proper comparison...

Comment 10

[Matthias Versen [:Matti]]

I get only a black image in FF9.0.1, Seamonkey trunk, Opera 11.60 and IE8 on win32.

What is the correlation between the .gif image and the site http://www.simplon.nl that you report it in one single bug ?

Comment 11

[Jens]

I thought those two were correlated because: the .gif was embedded in a site, this .gif gave then smearing just as the simplon site.
Also both gif files are black. The background on that particular div is a black 1 px gif file. http://www.simplon.nl/images/background/com_content/ci8.gif
So the connection I saw was black gif files.
I am also unable to reproduce this phenomena on a Windows 7 x64 machine (Fx, IE9). Safari on Mac also handles these examples well.
I will try to find someone with a mac and try to reproduce this.

Comment 12

[Jens]

(In reply to Tim (fmdeveloper) from comment #8)
> Jens -> Does this only happen with GIFs?

I was scrolling on youtube when the same happened (smearing) with a .jpg image, black 352 bytes: 
http://i2.ytimg.com/vi/a9FEoMtlTfk/default.jpg

Comment 13

[Matthias Versen [:Matti]]

This should be a dupe of bug 689962