I have written yet another chrome extension inspired by xkcd.com/1288 [xkcd:Substitutions] - http://goo.gl/pp9oj2 .
I did this since I couldn't find one that let you to edit the list of substitutions.
Since I'm a Java developer I'm aware to the fact that my js code have no style and is most probably bad :) , I'll be glad hear constructive comments!