got same problem on my sl 6.6, i downgraded yesterday to older version 
and that fixed crashing (but probably started some other security issues)
i use opera atm before they fix it

On 05/11/2016 06:16 AM, Andrew Z wrote:
> Gents,
>    boss (wife) started to complain that FF 45.1
> (2.6.32-573.12.1.el6.x86_64) started crashing on multimedia sites. And
> indeed youtube->any video - instant seg fault.
>
> FF was updated from 38 to 45 on Apr 27 together with java etc:
> Packages Altered:
>      Updated firefox-38.7.0-1.el6_7.x86_64  @sl-security
>      Update          45.1.0-1.el6_7.x86_64  @sl-security
>      Updated tzdata-2016c-1.el6.noarch      @sl-security
>      Update         2016d-1.el6.noarch      @sl-security
>      Updated tzdata-java-2016c-1.el6.noarch @sl-security
>      Update              2016d-1.el6.noarch @sl-security
>
> after that only Updated perf-2.6.32-573.22.1.el6.x86_64 @sl-security and
> ImageMagick-6.5.4.7-6.el6_2.x86_64 @sl-security/6.2 were updated.
>
> I saw something related on the Centos forums that i can no longer find
> (how handy! :( ) . The issues was related to NIX!'s versions of ffmpeg.
> But i don't have his repo installed:
> Loaded
> repo
> adobe-linux-x86_64
> elrepo
> *epel
> epel-debuginfo
> google-talkplugin
> linuxtech-release
> sl
> sl-debuginfo
> sl-security
> virtualbox
>
>
> Any clues are welcome.

-- 
*Karel Lang*
*Unix/Linux Administration*
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