Bug#810939: The bug is known, actually

[Patrice Pillot]

Hi,

As I tried to investigate the temporary file permission I noticed the 
/tmp/mozilla_mozillaUser0 directory which led me to :
- https://bbs.archlinux.org/viewtopic.php?id=206506 then to
- https://bugzilla.mozilla.org/show_bug.cgi?id=1233434

This explains everything and the workarounds are pretty easy to implement.

Sorry I could not find this earlier since I focused on Debian BTS. At the 
same time, this report is now here for the record...

I hope this shall be fixed in the version presently in experimental since 
the Mozilla bug reports indicates this is fixed in upstream 44.0 b4.

Bye,

phep