I've used Firebug for years and one of the most vexing issues is the fact
that the search box on live edit for css only works when it feels like it.
Most of the time, I get no result from the box. Once in a great while it
works perfectly. I've experienced this on mac, windows 7, and windows 8 so
I know it's not me. AND on the same css file. Some sometimes I will
search for a class by names and it won't search it, other times it will.