Bug 1293755

Summary:	Firefox 43 quits when attempting to display HTML 5 video
Product:	[Fedora] Fedora	Reporter:	John Gotts <jgotts>
Component:	firefox	Assignee:	Martin Stransky <stransky>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	unspecified
Version:	22	CC:	gecko-bugs-nobody, jeischma, jgotts, jhorak, stransky
Target Milestone:	---
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	firefox-43.0.3	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-01-06 10:56:38 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:

Description John Gotts 2015-12-23 02:30:03 UTC

Description of problem:
The new Firefox 43 build that was released today crashes when trying to display HTML 5 video. The previous Firefox 42 build (as of yesterday) was fine.

Version-Release number of selected component (if applicable):
43.0-1.fc22

How reproducible:
Always

Steps to Reproduce:
1. Go to https://www.google.com/?gws_rd=ssl#q=html+5+video+test
2. All links with HTML 5 video crash the browser

Actual results:
The browser crashes.

Expected results:
The browser should not crash and display HTML 5 video.

Additional info:
Not sure whether the problem is upstream or a problem with the build. If you go to the URL http://youtube.com/html5 you can see whether your browser is set up for HTML 5. Notably, mine is. Youtube does not crash the browser. It attempts to play HTML 5 video but then falls back to Flash.

Comment 1 John Gotts 2015-12-23 02:55:00 UTC

This does appear to be a problem with the Fedora 22 build.

If you use Mozilla's x86_64 Firefox 43.0 build with the same profile, the following page not only loads but the bottom two videos play fine.

http://www.quirksmode.org/html5/tests/video.html

The H.264/MP4 video does not play for me but that is probably a separate issue.

Interestingly, Youtube HTML 5 playback with Firefox 43.0 appears to be broken for both builds.

Comment 2 John Gotts 2015-12-27 21:34:39 UTC

Normally, if you go to the URL

https://www.youtube.com/html5

You want to have everything checked.

It looks like the regression with Firefox 43 was with the setting

MSE & H.264

In order to turn this specific setting off, you need to adjust the about:config setting

media.fragmented-mp4.enabled

and set it to false. With this setting disabled HTML5 video playback seems stable again.

Comment 3 Martin Stransky 2016-01-04 22:02:02 UTC

Can you please test this package?

http://koji.fedoraproject.org/koji/buildinfo?buildID=708766

Comment 4 John Gotts 2016-01-04 22:41:10 UTC

I have re-enabled

media.fragmented-mp4.enabled

and this new release looks good to me. No crashes.

Thanks for your hard work.

John

Comment 5 Martin Stransky 2016-01-06 10:56:38 UTC

Okay, Thanks.