InformAction Forums

Update: It looks like I have been just too impatient. While the crashes seem to come less frequent, they still happen without NoScript. Disabling hardware acceleration has helped, no more crashes since then, regardless of wether NoScript is installed/enabled. Might be related to https://bugzilla.mozilla.org/show_bug.cgi?id=885987, since this computer has a Radeon 7790 graphics card. I am sorry for bothering you with this erroneous bug report.

Original post follows for reference:
I am experiencing reproducible crashes in Firefox 29.0.1 with NoScript 2.6.8.24 on Windows 7 x64 when I visit http://www.bahn.de/. Scrolling down on the homepage is usually enough to crash firefox. Using the information and booking form on the left side is impossible for me. Firefox always crashes here, before I can get to the results. It does not matter if I whitelist bahn.de, this is reproducible with a clean firefox install with NoScript as the only extension installed and no settings changed at all. After disabling or uninstalling NoScript, I have no more crashes. So it looks like something in NoScript is triggering the crash.

> Bug 885987

Did you try Safe Mode (which disables Hardware Acceleration) ?

As expected, no crashes in Safe Mode. I was able to narrow it down to the option gfx.direct2d.disabled, my Firefox crashes when it is set to the default value false (and hardware acceleration is enabled). Changing gfx.direct2d.disabled to true and restarting Firefox is enough, no need to disable hardware acceleration completely.

> gfx.direct2d.disabled

Various times, various circumstances, I have problems with that Pref too & have long had it set to True.

(Though over time, particular graphics related combinations have caused problems too, where with one browser version things were fine, & with the next the old settings end up causing problems, so you may need to revisit your changes.)

(One of my encounters, Bug 763131 - large performance hit when applying custom css to tabbrowser.)

Thanks for the hint regarding "gfx.direct2d.disabled" but the string doesnt exist in my about:config. Do I have to create it or has this setting been completely abandoned in the most recent FF version?

> gfx.direct2d.disabled

I see it, in Windows.
Perhaps it is different on the Linux end?

Probably that pref is Windows only. I don't have it in SM 2.26 on either Mac or Linux.

Come to think of it, hardware 2d acceleration itself might be a Windows-only feature.