firefox core-dump on 10.1-RELEASE?

Arthur Chance freebsd at
Wed Aug 12 13:21:25 UTC 2015

On 12/08/2015 02:21, pete wright wrote:
> On Aug 11, 2015 5:22 PM, "Roland Smith" <rsmith at> wrote:
>> On Tue, Aug 11, 2015 at 12:08:26PM -0700, pete wright wrote:
>>> Hi,
>>> I recently upgraded firefox on my 10.1-RELEASE workstation via pkg and
>>> now have periodic core dumps.  I was wondering if anyone else has
>>> observed this behaviour?  If not I will attempt to get a debug build
>>> created locally and try to reproduce the fault.  Here's my info:
>> Yep, more people have noticed it.
>>>> uname -ar && pkg info |grep firefox
>>> FreeBSD 10.1-RELEASE-p10 FreeBSD 10.1-RELEASE-p10 #0:
>>> Wed May 13 06:54:13 UTC 2015
>>> root at amd64
>>> firefox-40.0,1 Web browser based on the browser portion of Mozilla
>> A temporary fix is implemented in 40.0_1,1; it works pretty well; have
> only
>> had one crash since.
>> But today the port was updated to 40.0_2,1, and 40.0_3,1 which failed to
> link
>> for me.  It seems that firefox is once again churning a little bit, as it
>> sometimes does.
>> Since firefox is quite a big build, I tend to make a package of the
> installed
>> version before upgrading, so I can always go back if it works.
> Thanks Roland for the reply.
> Fwiw to close this thread out - here is the fix mentioned in the previous
> twitter
> "use about:config and set
> layers.offmainthreadcomposition.enabled
> to false."
> This has done the trick for me so far.

Just had a crash with that change done. However, FF lasted about 6 
hours, whereas it was lasting less than an hour before.

Those who do not learn from computing history are doomed to

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