This is why I unmapped Backspace -> Back in Firefox. It's just a source of heartache. Typical example is trying to backspace in a textarea -- whoops -- textare

This is why I unmapped Backspace -> Back in Firefox. It's just a source of heartache. Typical example is trying to backspace in a textarea -- whoops -- textarea didn't have focus. Your progress was probably lost because most textareas these days are actually some textarea-looking Javascript magic.