Woo! We watched crash reports and we see it is a so common problem under Linux, caused by libmozjs185.so. The crash is only happening on Firefox 15 under Linux (only 1 crash report on Firefox 16a2, there are 407 crash reports under 15.0). The most probable source of the problem may be that Firefox didn't update correctly that library during update. Have no big idea about how could it be solved, but I suggest you some things you may try.

• Open YaST package manager and make sure libmozjs is updated (type its name on the search box). If it's not, update it. If it is, mark it for reinstallation.
• Completely uninstall Firefox and all its dependencies. On YaST package manager remove firefox, firefox-branding-opensuse, and all Firefox packages you see. Then open a terminal and type sudo yum clean all and press Enter. After that, reinstall firefox using official source files.
• Reset Firefox (explained below).
• Try to clear cache and cookies. Sometimes Firefox does this once closing, and maybe if there is a problem while cleaning cache and cookies, Firefox may crash.
• Keep your computer virus clean. There ARE viruses for Linux, so install clamtk and check you don't have any.

The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information. Note: This will cause you to lose any Extensions, Open websites, and some Preferences.

To Reset Firefox do the following:

1. Go to Firefox > Help > Troubleshooting Information.
2. Click the "Reset Firefox" button.
3. Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
4. Firefox will open with all factory defaults applied.

Further information can be found in the Refresh Firefox - reset add-ons and settings article.

Did this fix your problems? Please report back to us!

sorry, but this answer does not really solve the problem. there are about 300 crash reports in a week https://crash-stats.mozilla.com/report/list?signature=libmozjs185.so.1.0.0%400xa694b

and here is also a bug-report: https://bugzilla.novell.com/show_bug.cgi?id=759123

my solution: uninstall libproxy1-pacrunner-mozjs (zypper rm libproxy1-pacrunner-mozjs) but im not sure what side-effects it has.

Yeah, i have tried marcsances's solution step by step (except for the virus issue, i guess my system is virus free), but it's a pity that the problem is still there. I haven't tried spaced30's suggestion. May it help. anyway great thanks to both.

Try to install the latest mozilla-xulrunner20 package if you do not have it.

I had this issue also. Spaced30's solution appears to have fixed the problem; Firefox has not crashed on closing since. So far, I have had no issues from uninstalling libproxy1-pacrunner-mozjs

I had the issue. After research, i found that forum. Yes Spaced30's solution has fixed the problem. Thanks.

BTW: i don't know what that libproxy1-pacrunner-mozjs is used for.

RESOLVED : SDB:Firefox 15 crashes on exit

           http://en.opensuse.org/SDB:Firefox_15_crashes_on_exit

Situation

After an upgrade of Firefox to version 15, it always crashes when it exits.

(It's not exactly version 15 causing this but sometimes zypp reinstalls the package causing the issue on upgrades. It's also not limited to crashes on exit. By far most of the known crashes have the same cause and this fix should stabilize your Firefox again.) [edit] Procedure

Uninstall the package "libproxy1-pacrunner-mozjs" with YaST or zypper:

zypper rm libproxy1-pacrunner-mozjs

or directly with rpm:

rpm -e libproxy1-pacrunner-mozjs

- - - - -

Self used zypper, and Firefox has opened, browsed pages, closed OK, opened, browsed pages and closed a second time OK :-)

Yet to see if fix lasts the restart later today.