Firefox and backspace

Under Linux the backspace button in Firefox will do nothing on default. I find that very annoying, because I'm not very much of a mouser. I prefer the backspace to perform a page back action. To make this happen, do the following:

Type "about:config" in the address bar of Firefox and press Enter. Filter for "browser.backspace_action" and change its value to 0 (zero).

0 is for page back
1 is for page up
2 is for doing nothing