Protonator
Protonator
Thanks for the informations. But why are the tests in Chromium-Edge without its tracking protection and with the same Privacy Badger version (with disabled automatic learning) not failing? 
I got the same problem in the Steam overlay (Linux client) and certain ingame chat functions (e. g. Worms WMD via Proton 4.11, but native Linux games, too), especially with...
Thanks seboss666. German and English UTF-8 were already uncommented in my locale.gen, but sudo locale-gen did the trick here. I can now use special characters in the Steam overlay, too...