Install this update to fix a situation where the computer does not hibernate and you receive an "Insufficient System Resources Exist to Complete the API" error message.
I was able to get libxml working until I tried using libxslt, which surprisingly broke libxml. This fix applied only to the xml part (require 'xml/libxml') and not the xsl part (require 'libxslt') it worked
I used to use keyconfig to do this (stop backspace from causing the browser to back up a page), but you can just edit about.config to do the same without having to add an extension.