Developer credits
Git commits in Moodle 2.5.3 by Jean-Michel Vedrine
commit 4f80368f824789286f5110b87a1cb4092c1bc869 Author: Jean-Michel Vedrine <vedrine@vedrine.org> Date: Thu, 31 Oct 2013 00:55:34 +0800 Tag: v2.5.3 MDL-41624 DragMath crashes Firefox