When writing text/posts on facebook in Tor, I cannot use shift+Enter to create a blank space to the next line of text.
shift+Enter, only enters my posting.
If that can't be fixed, how do I put some air between lines, for easier reading?
This seems to be a general issue with keyboard input handling not being handled correctly, there's already a bugreport about it (currently unresolved) in the Tor bug tracker.
I can also confirm it doesn't only affect facebook, but all pages which have different behaviour for Shift+Enter compared to just Enter.
This also means the issue has nothing to do with the level you set the security slider of the Tor Browser to.
You can use Facebook in different ways: