greets!
don't know if it's related to Stretch - I recently upgraded from Jessie (now somewhat to my regret) - but I did an update of Firefox via the Mozilla online update.
subsequently (and as an effect?) Firefox lost vertical scrollbars. I tried various things with the themes (unsystematically) and now have a circumstance where I get:
"GTK+ 2.x symbols detected. Using GTK+ 2.x and GTK+ 3 in the same process is not supported"
when I try to start Firefox, Pan and Google-Chrome-Stable. online googling has so far yielded nothing useful.
I assume I have some combination of Desktop 'effects' which clash. I'm guessing. I can list various things but perhaps I'll wait for wiser guidance.
I will say I have:
Redmond as GTK2 Style Use my TDE Style in GTK3 apps GTK@ Fonts uses Times New Roman Decorations: Plastik
(btw I still have the issue of menu items playing hide-and-seek in OpenOffice.)
fjd