Ubuntu 16.04 and later
Tor Browser (torbrowser-launcher) is available in the default Ubuntu repositories in Ubuntu 16.04 and later. torbrowser-launcher handles
downloading the most recent version of Tor Browser Bundle for you, in your language and for your architecture. After installing Tor Browser, it can be launched by searching for tor in the Dash and clicking the Tor Browser icon. The Tor Browser Launcher Settings app is also installed along with Tor Browser.
Update the gpg key:
gpg --homedir "$HOME/.local/share/torbrowser/gnupg_homedir/" --refresh-keys --keyserver pgp.mit.edu
Tor Browser still may not launch after updating the gpg key due to being unable to update the Tor Browser version in:
your-username with your username and replace
en-US with your language in the following commands and run these commands:
A Gedit window will open up. Copy the string
TORBROWSER_VERSION=7.5 into the Gedit window and save the file.
Launch Tor Browser for the first time.
Now Tor Browser will launch normally by clicking its icon. If an update to Tor Browser is available, the update will be installed as usual.