Just noticed a new extension for Firefox, blocks, i.e. tetris. small little download, install it and run it from the Tools menu. Just a little popup with those shapes and colours that will bring you back to those long-gone 1990s.
I foresee many hours clicking away on my keyboard’s arrow keys, stressing the tendons of my right wrist and hand, and having to explain that! Now, if only someone could configure Three Vikings, I would be in heaven.