I've found the problem. See here: https://launchpad.net/~micahflee/+archive/ubuntu/ppa/+packages
The PPA does not have torbrowser-launcher packaged for Xenial, only Bionic and Cosmic. Since Trisquel 8 is based on Xenial, there's no package available. If I were you I'd build it from source. The build instructions look very straightforward. https://github.com/micahflee/torbrowser-launcher/blob/develop/BUILD.md
signature.asc
Description: PGP signature
