Firefox keeps crashing

Hi

I do not know what is wrong, but this morning, firefox started crashing on its own (Debian GNU-Linux Testing). I did an strace :

----snipped a large chunk ------

access("-home-msingh-.kde--share-icons-IcOsX-16x16-actions-viewmag-.png", FOK) = 0 access("-home-msingh-.kde--share-icons-IcOsX-22x22-actions-viewmag-.png", FOK) = 0 read(23, , 4000) = 0 close(23) = 0 access("-home-msingh-.gtkqtenginerc.enUS", FOK) = -1 ENOENT (No such file or directory) access("-home-msingh-.gtkqtenginerc.en", FOK) = -1 ENOENT (No such file or directory) access("-home-msingh-.themes-Qt-gtk-2.0-gtkrc", FOK) = -1 ENOENT (No such file or directory) access("-usr-share-themes-Qt-gtk-2.0-gtkrc", FOK) = 0 lstat64("-usr-share-themes-Qt-gtk-2.0-gtkrc", {stmode=SIFREG0644, stsize=82, ...}) = 0 open("-usr-share-themes-Qt-gtk-2.0-gtkrc", ORDONLYOLARGEFILE) = 23 read(23, "style"default-"-n{-n engine"qten"..., 4000) = 82 access("-home-msingh-.gtkqtenginerc", FOK) = 0 open("-home-msingh-.gtkqtenginerc", ORDONLYOLARGEFILE) = 53 fstat64(53, {stmode=SIFREG0644, stsize=13561, ...}) = 0 fstat64(53, {stmode=SIFREG0644, stsize=13561, ...}) = 0 mmap2(NULL, 131072, PROTREADPROTWRITE, MAPPRIVATEMAPANONYMOUS, -1, 0) = 0xb2748000 read(53, "# IcOsX, baghira-n-n# This file wa"..., 131072) = 13561 close(53) = 0 munmap(0xb2748000, 131072) = 0 read(23, , 4000) = 0 close(23) = 0 access("-usr-share-themes-Qt-gtk-2.0-gtkrc.enUS", FOK) = -1 ENOENT (No such file or directory) access("-usr-share-themes-Qt-gtk-2.0-gtkrc.en", FOK) = -1 ENOENT (No such file or directory) uname({sys="Linux", node="nanak", ...}) = 0 unlink("-home-msingh-.mozilla-firefox-u4f9fs4a.Default User-lock") = 0 rtsigaction(SIGSEGV, {SIGDFL}, NULL, 8) = 0 rtsigprocmask(SIGUNBLOCK, SEGV, NULL, 8) = 0 tgkill(22941, 22941, SIGSEGV) = 0 +++ end by SIGSEGV +++ Process 22941 detached

There are two user directories under .mozilla-firefox and I am tempted to save my bookmarks elsewhere, delete the one it is using and retry, but I would first like to understand the reason for the segfault.

Versions :

1.5.0.4

I remember seeing a security advisory regarding firefox that affected all platforms - some javacode leading to a race condition leading to a crash

Now, I did not upgrade because upgrading to the latest versions on Debian Stable Testing is such a pain and my initially loaded tabs (5 of them) have no javascript on them. This is not to say that this crash has nothing to do with that, but I would first like to understand why is the browser crashing.