sudo apt purge chromium-browser chromium-chromedriver Bye bye, fake Chromium packages.

Debian still maintains Chromium as a regular package in their APT repository. We can configure Ubuntu to get it from there, and continue to receive timely security updates along with all of our other OS updates. This makes sense from a security perspective, since Debian is where Ubuntu already gets most of its packages, and is a very well known high-profile project. There is no need to risk installing software from some random source or telling your system to trust a PPA.

You can use Chromium from the Debian buster repository.

There's a lot of advice online showing how to get rid of snap. (e.g.: https://cialu.net/how-to-disable-and-remove-completely-snaps-in-ubuntu-linux/ worked for me) so the only result (so far, a few months later) is that Chromium has lost a user, and having upgraded Ubuntu since the original Warty, if snap becomes obligatory I'll have to take a look at Mint, or Devuan.

The strangest "quirk" I had was that I couldn't get the web browser to save a file directly to an attached, encrypted drive. Permissions problem. So I had to save to an interim folder then move it across by hand. Utter pain.