Hardening Qubes-Whonix

Good ideas! Yes, please add!

Yes. And also copy something else into the clipboard after pasting so the password is purged from the clipboard so it cannot be accidentally pasted elsewhere.

Should not TBB do that on high security setting? Was this discussed by Tor Project? Add a bug report against TBB?

Needs to be added.

Keyboard input is mentioned here:

Not sure if the importance of that information is properly highlighted. I am wondering if the Whonix wiki information structure can be improved. There is some overlap for the following pages.