Worth considering capturing the keyboard input. I instinctively hit "delete" partway through to delete something I had clicked on and it took me back to HN and I lost my progress.
do you ever actually use backspace to go back a page? If not, turn it off in your browser settings, since you'll only ever use it accidentally anyway. (And what's more, you'll only ever use it accidentally while you're trying to edit text you've input .) to me backspace going back a page = a sense of frustration. better to turn it off in the browser, so I did so.
Good call. I use ⌘-← all the time to go back but never backspace