I'm not a chrome user, but I would be happy if Firefox would give me a prefs option to disable "Backspace as back".
When I'm on a laptop, and typing a post, and want to hit the backspace key to erase something I've typed, it's really frustrating when the entire page and textbox disappears, because I've bumped the touchpad, and then hit the backspace key, such that I don't delete the last text I've typed, but instead, it interprets it as me wanted to go "Back".
Thankfully, Firefox caches the typed text in most cases, so I can just hit "Forward" again, but if I accidentally click on something else, before being able to hit "Forward", I'll lose my text.
Before you go thinking that I'm a clutz for not being able to use a trackpad, some laptops, including the one I like to use lately, have some pretty severe trackpad tracking issues. To say nothing about "clickpads", and inaccurate input.