@rob-bob-dave
Update:
dpkg --list
shows no sign of opera-beta or opera to uninstall through the command line

Heads up.
I thought (foolishly) that I would give Opera Beta a try only to find no access to any menu at all. No settings etc. Any attempt to uninstall/remove has resulted in failure and the following message:

Detailed errors from the package manager follow:

snapd operation finished with error cannot perform the following tasks:

• Save data of snap "opera-beta" in automatic snapshot set #6 (cannot create archive: tar: 79/.config/opera-beta/oauc_pipe: socket ignored (and 31 more))

In trying to correct the printer problem, Opera doesn't recognise my network printer, I upgraded to the latest ver. What a mistake. Now nothing works with "right click". Tried to revert to a historical version, nope, the latest ver downloads. It is a darn good thing I hadn't removed Chromium yet, I need something that works and is reliable.