Firefox + SeaMonkey (gecko browsers) instant crash on some web pages

[Miroslav Lachman]

Steve Wills wrote on 10/09/2015 13:57:
> Hi,
>
> On 10/09/2015 03:38, Miroslav Lachman wrote:
>> Steve Wills wrote on 10/08/2015 21:55:
>>> Just to test, try setting gfx.canvas.azure.backends and
>>> gfx.content.azure.backends to skia in about:config and see if it still
>>> crashes.
>>
>> Hi Steve,
>>
>> I changed both from cairo to skia. Firefox crashed again on www.mapy.cz
>> but on next start www.mapy.cz and www.seznam.cz works normally. So this
>> can be a workaround.
>>
>> When I entered www.mapy.cz this messages were printed on console but FF
>> didn't crash
>>
>
> Yes, you have to restart for it to take effect. BTW, I think only
> changing gfx.canvas.azure.backends is necessary,
> gfx.content.azure.backends can remain at default setting.
>
>
>>> firefox
>>
>> (process:8936): GLib-CRITICAL **: g_slice_set_config: assertion
>> 'sys_page_size == 0' failed
>> Fontconfig warning: "local.conf", line 1093: saw number, expected matrix
>> libGL error: Calling driver entry point failed
>> libGL error: reverting to software direct rendering
>> libGL error: failed to load driver: vboxvideo
>> ATTENTION: default value of option force_s3tc_enable overridden by
>> environment.
>
> Yeah, GL stuff isn't going to get hardware acceleration in vbox, no
> surprise there. Should be fine though, I think.
>
>> Can I use "skia" or does it have some negative impact? (I don't know
>> what these two settings mean)
>
> The only negative impact could be slower performance in some cases. But
> it does provide better performance in other cases, so it depends. And of
> course, not crashing is a benefit. :)

Hi Steve,

A "skia" fixed crashes on mapy.cz and seznam.cz but from this time I got 
random crashes of Firefox and Seamonkey (both with "skia"). Until this 
change Seamonkey was happily runnig for a few weeks (system uptime 20 
days). I have more than 5 crashes today.
Is there a way to track this issue or some other way to fix mapy.cz and 
seznam.cz crashes without bringing this instability?

Miroslav Lachman