Thanks! http://forums.debian.net/viewtopic.php?f=6&t=128288 sems to have relevant information.
Kjetil On Sat, May 14, 2016 at 10:14 AM, Jörg-Volker Peetz <jvpe...@web.de> wrote: > I've filed a bug already (#822944) without remedy so far. It's due to > changes in > gtk-3. That's also the reason why the firefox package got back to link > against gtk2. > I downgraded gtk-3 to 3.18 on my system. > > Regards, > jvp. > > >