805392 - GIF animation with n loops stops after 1 loop

Status: RESOLVED WORKSFORME

(Core :: Graphics: ImageLib, defect)

Description

[Matvey]

Attachment: testLooped2times.gif

User Agent: Mozilla/5.0 (Windows NT 6.1; rv:17.0) Gecko/17.0 Firefox/17.0
Build ID: 20121023124120

Steps to reproduce:

Created a 2-frame GIF animation that is cycled 2 times (attached) using Adobe Photoshop.


Actual results:

The animation ran only once in Firefox 17 beta, stopping on the second frame.


Expected results:

The animation should have run two times.

Comment 1

[Matvey]

This GIF animation runs 2 times in Chrome, Safari on Windows, IE 7-9 (didn't test in IE6).

Opera 12.02 shows the animation only once, similar to Firefox.

Comment 2

[Simona Badau, Desktop QA]

Mozilla/5.0 (Windows NT 6.1; rv:19.0) Gecko/19.0 Firefox/19.0
Build ID: 20121030030633

I can confirm that the GIF animation runs only once.

Comment 3

[Simona Badau, Desktop QA]

Reproducible ever since Firefox 4.0, on Windows 7, Ubuntu 12.04 and Mac OS X 10.7.

Comment 4

[Šime Vidas]

In Firefox stable 37.0.2, the animation runs indefinitely. I’m also seeing the same in Nightly. Looks like, after 2 and 1/2 years, Firefox’s code for rendering GIFs now displays a different bug.