Here’s how I “install” it - i.e. it’s not an “install” it’s all manual stuff hosting the binaries in a folder on my home directory on my Linux machine.
Download the x86_64 binary from here :
https://www.torproject.org/dist/torbrowser/10.0.10/tor-browser-linux64-10.0.10_en-US.tar.xz
I run it from ~/sbin…
e.g.
If there isn’t an sbin folder in my $HOME, then make it so (if you know you don’t have a ~/sbin just make it) :
[ ! -d ~/sbin ] && mkdir ~/sbin
cd ~/sbin
tar tvf ~/Downloads/tor-browser-linux64-10.0.10_en-US.tar.xz
Note - I ALWAYS list (tar tvf) the contents of tar archives before extracting them - been caught out before extracting thousands of files into “/” 
…
Extract that sucker :
tar xvf ~/Downloads/tor-browser-linux64-10.0.10_en-US.tar.xz
cd tor-browser_en-US
Edit the file “start-tor-browser.desktop” with your text editor of choice and set the “Exec=” to the correct path where you intend running it from (e.g. in my case ~/sbin/tor-browser-US) :
Exec=sh -c ‘“/home/x/sbin/tor-browser_en-US/Browser/start-tor-browser” --detach || ([ ! -x “/home/x/sbin/tor-browser_en-US/Browser/start-tor-browser” ] && “$(dirname “$*”)”/Browser/start-tor-browser --detach)’ dummy %k
And “Icon=”
Icon=/home/x/sbin/tor-browser_en-US/Browser/browser/chrome/icons/default/default128.png
(where user account - in my case = “x”)
cp start-tor-browser.desktop ~/.local/share/applications/.
And now you should have a “Tor Browser” application in your listed applications (this is Ubuntu 20.04 with Gnome). If that doesn’t work (e.g. not Ubuntu) - then maybe something like :
sudo cp start-tor-browser.desktop /usr/share/applications/.
But you could also just run it from there e.g. :
cd ~/sbin/NEW-tor-browser_en-US/Browser
./start-tor-browser
Note - I hardly ever install it from “scratch” like this - if I’m building a new desktop environment - I just grab the folder from another computer e.g.
cd ~/sbin
rsync -av -e ssh user@computer:~/sbin/tor-browser-US .
