Retrace done.
Extract from retraced stacktrace:
...
#3 signal handler called
#4 gtk_style_realize (style=0x8ba7000, colormap=0x0) at gtkstyle.c:839
#5 IA__gtk_style_attach (style=0x8b93200, window=0x88845c0) at gtkstyle.c:752
#6 gtk_widget_set_style_internal (widget=0x8922298,
*** This bug is a duplicate of bug 72018 ***
https://bugs.launchpad.net/bugs/72018
** This bug has been marked a duplicate of bug 72018
MASTER Firefox Crash [EMAIL PROTECTED] [EMAIL PROTECTED]::Show]
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[EDGY] firefox crashed [@ gtk_style_realize] [@ IA__gtk_style_attach]