Firefox crashing when playing video on Youtube (HTML5)
Latest version of Firefox for Mac OS X 10.11 crashes when playing Youtube video.
Symptoms: - Blocky Artifacts on the screen - Hard Lock up - Slow performance
Does not occur under Safari, or Chromium. Does not occur under old version of Firefox (v. 37).
Mac Mini 2012 i7 processor 16 GB Memory 1TB HDD OSX 10.11 El Capitan
Additional System Details
- Provides information about the default web browser
- Shockwave Flash 19.0 r0
- User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:37.0) Gecko/20100101 Firefox/37.0
Can you please go through these help articles, some of the solution out ther may help you out.
Please reply back for any help.
In the current release Firefox might be using the HTML5 media player instead of a Flash based player in older Firefox versions.
You can try to set media.apple.mp4.enabled to false on the about:config page to see if that has effect. You can open the about:config page via the location/address bar. You can accept the warning and click "I'll be careful" to continue.