Thank you. I've been using Dorando KeyConfig for ages (even when it stopped being officially supported, and I had to sneak it in to Firefox) - I _hate_ backspace taking me back a page any time a text field isn't in focus, and the Alt-arrow back and forward drives me nuts (a two-handed shortcut? Really? I know, there's an Alt key on the right too - I never use it). I was afraid I'd lose my fixes - Alt-z for back and Alt-x for forward - with version 57. Thank you so much for making this!

It is a little bit complicated, because the text fields for creating a shortcut will happily take Alt or Backspace and then ignore it because it's not the key (which is alt or backspace - no caps). I had to go round a couple times to get that set up right (the instructions on the right are very helpful). But now it works, yay! Saved my sanity.