Comment 7 for bug 2000077

BTW, if the Tor browser is needed immediately, the work-around is:
go to https://www.torproject.org/download/
download for Linux
"Untar" it and cd into the created directory
run ./start-tor-browser.desktop --register-app
Find the Tor browser entry in your menu system or run the above leaving off the --register-app parameter

The above came from an article I found on the web under "manual installation" and worked for me. It's not the greatest solution since it's a one-off and, if you want a desktop icon, you have to find/copy the menu entry item.