Two themes at the same time. Not a bug, I believe. 
And, Ermine looking on.
Touchscreen movements, such as zooming, scrolling doesn’t work with Firefox, but works normally with Vivaldi. Also works with Nautilus, such as expanding, moving around etc.
Can put different apps in a folder, still unnamed, just by dragging in. Don’t know how to rename that “Unnamed F…” yet. No more than 10 characters are shown. (This might be a bug.)
EDIT: Found how. org>gnome>desktop>app-folders>folders and changed the name to Accessories.