Firefox and Chrome wont start after upgrade - libglib involved?

After a couple of upgrades (zypper dup) I am no longer able to start Firefox or Chrome. When I start Firefox this is what I get in my journal:

Code:
aug. 08 15:41:48 linux-4sat sudo[9064]: pam_unix(sudo:session): session opened for user root by knut(uid=0)
aug. 08 15:41:55 linux-4sat plasmashell[2768]: trying to show an empty dialog**
aug. 08 15:41:57 linux-4sat plasmashell[2768]: trying to show an empty dialog**
aug. 08 15:42:00 linux-4sat kwin_x11[2761]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 53319, resource id: 39847183, major code: 18 (ChangeProperty), minor code: 0****
aug. 08 15:42:00 linux-4sat kernel: traps: firefox[9066] trap int3 ip:7f108b485ec5 sp:7fff4cbdb3f0 error:0 in libglib-2.0.so.0.6000.6[7f108b43e000+80000]
aug. 08 15:42:00 linux-4sat systemd[1]: Started Process Core Dump (PID 9077/UID 0).
aug. 08 15:42:00 linux-4sat kernel: traps: crashreporter[9076] trap int3 ip:7f2b089d5ec5 sp:7ffca6ba99b0 error:0 in libglib-2.0.so.0.6000.6[7f2b0898e000+80000]
aug. 08 15:42:00 linux-4sat systemd[1]: Started Process Core Dump (PID 9087/UID 0).
aug. 08 15:42:01 linux-4sat systemd-coredump[9101]: Process 9076 (crashreporter) of user 1000 dumped core.****

                                                **Stack trace of thread 9076:******
                                                **#0  0x00007f2b089d5ec5 n/a (libglib-2.0.so.0)******
                                                **#1  0x00007f2b089ca895 g_log_default_handler (libglib-2.0.so.0)******
                                                **#2  0x00007f2b089d60eb g_logv (libglib-2.0.so.0)******
                                                **#3  0x00007f2b089ccaaf g_log (libglib-2.0.so.0)******
                                                **#4  0x00007f2b08090efa n/a (libgio-2.0.so.0)******
                                                **#5  0x00007f2b08acdd3c n/a (libgobject-2.0.so.0)******
                                                **#6  0x00007f2b08ace580 g_object_new_valist (libgobject-2.0.so.0)******
                                                **#7  0x00007f2b08acef59 g_object_new (libgobject-2.0.so.0)******
                                                **#8  0x00007f2b06ffc2e6 n/a (libunity-gtk-module.so)******
                                                **#9  0x00007f2b06ffc4ac gtk_module_init (libunity-gtk-module.so)******
                                                **#10 0x00007f2b08d5e0d5 n/a (libgtk-3.so.0)******
                                                **#11 0x00007f2b08ac8e82 g_closure_invoke (libgobject-2.0.so.0)******
                                                **#12 0x00007f2b08ab7924 n/a (libgobject-2.0.so.0)******
                                                **#13 0x00007f2b08abbac7 g_signal_emit_valist (libgobject-2.0.so.0)******
                                                **#14 0x00007f2b08abc92f g_signal_emit (libgobject-2.0.so.0)******
                                                **#15 0x00007f2b08acfe04 n/a (libgobject-2.0.so.0)******
                                                **#16 0x00007f2b08acbad2 g_object_notify (libgobject-2.0.so.0)******
                                                **#17 0x00007f2b08691ea8 n/a (libgdk-3.so.0)******
                                                **#18 0x00007f2b08abbc7f g_signal_emit_valist (libgobject-2.0.so.0)******
                                                **#19 0x00007f2b08abc7f9 g_signal_emit_by_name (libgobject-2.0.so.0)******
                                                **#20 0x00007f2b086beb77 n/a (libgdk-3.so.0)******
                                                **#21 0x00007f2b08691cd8 gdk_display_manager_open_display (libgdk-3.so.0)******
                                                **#22 0x00007f2b08d40fc3 gtk_init_check (libgtk-3.so.0)******
                                                **#23 0x0000559424bfb320 n/a (crashreporter)******
                                                **#24 0x00007f2b0922ebcb __libc_start_main (libc.so.6)******
                                                **#25 0x0000559424beb0ea n/a (crashreporter)******

aug. 08 15:42:01 linux-4sat systemd[1]: systemd-coredump@7-9087-0.service: Succeeded.
aug. 08 15:42:01 linux-4sat kwin_x11[2761]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 53907, resource id: 39847189, major code: 18 (ChangeProperty), minor code: 0****
aug. 08 15:42:01 linux-4sat systemd-coredump[9078]: Process 9066 (firefox) of user 1000 dumped core.****

                                                **Stack trace of thread 9066:******
                                                **#0  0x00007f108b485ec5 n/a (libglib-2.0.so.0)******
                                                **#1  0x00007f108b486106 g_logv (libglib-2.0.so.0)******
                                                **#2  0x00007f108b47caaf g_log (libglib-2.0.so.0)******
                                                **#3  0x00007f108b638efa n/a (libgio-2.0.so.0)******
                                                **#4  0x00007f108b57dd3c n/a (libgobject-2.0.so.0)******
                                                **#5  0x00007f108b57e580 g_object_new_valist (libgobject-2.0.so.0)******
                                                **#6  0x00007f108b57ef59 g_object_new (libgobject-2.0.so.0)******
                                                **#7  0x00007f1083aa42e6 n/a (libunity-gtk-module.so)******
                                                **#8  0x00007f1083aa44ac gtk_module_init (libunity-gtk-module.so)******
                                                **#9  0x00007f108bf3e0d5 n/a (libgtk-3.so.0)******
                                                **#10 0x00007f108b578e82 g_closure_invoke (libgobject-2.0.so.0)******
                                                **#11 0x00007f108b567924 n/a (libgobject-2.0.so.0)******
                                                **#12 0x00007f108b56bac7 g_signal_emit_valist (libgobject-2.0.so.0)******
                                                **#13 0x00007f108b56c92f g_signal_emit (libgobject-2.0.so.0)******
                                                **#14 0x00007f108b57fe04 n/a (libgobject-2.0.so.0)******
                                                **#15 0x00007f108b57bad2 g_object_notify (libgobject-2.0.so.0)******
                                                **#16 0x00007f108bc09ea8 n/a (libgdk-3.so.0)******
                                                **#17 0x00007f108b56bc7f g_signal_emit_valist (libgobject-2.0.so.0)******
                                                **#18 0x00007f108b56c7f9 g_signal_emit_by_name (libgobject-2.0.so.0)******
                                                **#19 0x00007f108bc36b77 n/a (libgdk-3.so.0)******
                                                **#20 0x00007f108bc09cd8 gdk_display_manager_open_display (libgdk-3.so.0)******
                                                **#21 0x00007f1087306a08 n/a (libxul.so)******
                                                **#22 0x00007f10872fa568 n/a (libxul.so)******
                                                **#23 0x00005573363eb0eb n/a (firefox)******
                                                **#24 0x00005573363e7044 n/a (firefox)******
                                                **#25 0x00007f108cb6ebcb __libc_start_main (libc.so.6)******
                                                **#26 0x00005573363e347a _start (firefox)******

aug. 08 15:42:01 linux-4sat systemd[1]: systemd-coredump@6-9077-0.service: Succeeded.
aug. 08 15:42:01 linux-4sat plasmashell[2768]: file:///usr/share/plasma/plasmoids/org.kde.plasma.taskmanager/contents/ui/Task.qml:375: TypeError: Type error****
aug. 08 15:42:01 linux-4sat plasmashell[2768]: file:///usr/share/plasma/plasmoids/org.kde.plasma.taskmanager/contents/ui/Task.qml:347: Unable to assign [undefined] to int****
aug. 08 15:42:03 linux-4sat plasmashell[2768]: KActivitiesStats( 0x5571a7ee6ff0 ) ResultModelPrivate::onResultScoreUpdated result added: “applications:firefox.desktop” score: 32.4797 last: 1565271720 first: 1506
451849


******I have had this problem before, but after a upgrade to libglib everything worked, up til now. Am I alone with this problem? Can this be fixed?

Knut H.******

This seems to be the bug described in https://bugzilla.opensuse.org/show_bug.cgi?id=1131076. My resolution was to add the lines: Defaults umask=0022 Defaults umask_override as described in the bug report to the end of my /etc/sudoers file. Important! Use visudo to edit this file! Read the description in the end of the bug report.