Talking about package manager on Linux, flatpak gained attention recently. Installation is easy, this is about installing on Ubuntu.
If you’ve some trouble installing an application using the package manager shipped with your distro, you can give it a try, since it’s available on 22 distro by now.
In the above case, torbrowser packet is broken on a Ubuntu 18.04, as many users noted out on the package page. Installing the package via flatpak, everything run smoothly in minutes.
flatpak search PACKAGENAME
flatpak install PACKAGENAME
Command line output is very complete, but if you want to use a GUI, on Ubuntu gnome-software (Ubuntu Software) will list the flatpak packages too, just read the package info on bottom of the description page and search packages as usual.