Comment 128 for bug 60995

Just look through the ~100 comments on http://ubuntu.wordpress.com/2006/12/21/fix-firefox-backspace-to-take-you-to-the-previous-page/ if you think that there are people out there who like this doing nothing.

If you want to prevent people from losing form data, prevent them from losing form data universally with a "do you want to discard this form?" dialog. Don't cripple the key bindings as a band-aid for a problem that most users don't even have.