Comment 1 for bug 421403

This is NOT a duplicate of bug #386017 (as it was previously tagged) as it is not at all specific to touchpads (occurs using any 3-button mouse). It is also specifically a firefox issue (it has affected all versions of Firefox on all varieties of Linux I have used). I am not the only one: http://ubuntuforums.org/showthread.php?t=260707

The suggested fix solves the issue and doesn't appear to affect any functions - it would be trivial to make this change default.