Added the upstream bug that includes an easy fix to make these buttons work out of the box.
Please also see the corresponding firefox bug https://launchpad.net/products/firefox/+bug/24582 -- ThinkPad Back and Forward keys do not work https://launchpad.net/bugs/20204 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
