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Date: Fri, 11 Apr 2014 14:27:41 -0700 (PDT)
From: Jakub Lach <jakub_lach@mailplus.pl>
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References: <laus7d$3nh$1@lorvorc.mips.inka.de>
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Subject: Re: Firefox noticeably less stable on 10.0
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I think that I've finally confirmed that problem is caused by/connected to 
multimedia/gstreamer1-libav. 

If this plugin is present, youtube prefers mp4 videos and firefox core dumps 
when rewinding. If this plugin is absent, youtube is forced to display only 
vp8/360p videos and rewinding is 100% safe.



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