853853 - Partial bitmap rendering error Javascript related

Status: RESOLVED DUPLICATE of bug 853337

(Firefox :: Untriaged, defect)

Description

[Yani]

Attachment: bugff-1.png

User Agent: Mozilla/5.0 (Windows NT 6.2; Win64; x64; rv:22.0) Gecko/20130322 Firefox/22.0
Build ID: 20130322031028

Steps to reproduce:

Facebook slideshow


Actual results:

Only the top part of the bitmap rendered at full resolution


Expected results:

Full render

Comment 1

[Matthias Versen [:Matti]]

>Steps to reproduce:
>
>Facebook slideshow

You have explain how someone like me can reproduce an issue and you have to do that step by step and including an example URL. I don't use facebook and therefore I don't know what you mean with "Facebook slideshow"

Comment 2

[Yani]

Should I start with... "create a Facebook account"?

Here is an easier method...

http://www.handfoto.com/category/image-galleries/advertising

The impact is slightly different as in this case the rendering is white space and not pixelated. Most likely Facebook render to a progressive jpg.

That uses a common JS slideshow, from memory Lightbox JS. 

Click on an image, cycle though the set with mouse of image right.

Most likely images effected are larger ones.

Comment 3

[Yani]

I'll do a test in safe mode... BRB

Comment 4

[Yani]

Attachment: Addition example with Lightbox JS

Comment 5

[Yani]

The issue didn't appear in testing in Safe Mode.
All plugins were then disabled and the browser restarted
The issue exists in normal Firefox mode even when all plugins are disabled.

It seems like some sort of load check is not done when an image is loaded via JS.

Comment 6

[Matthias Versen [:Matti]]

the safemode disables the hardware acceleration..