I still love those icons too, and I used them for several apps I built.
You may not have heard of the Fugue icon set, created around 2010-ish by Yusuke Kamiyamane, which provided 3,750 16x16 icons in the style of famfamfam and the silk icon set.
I thought Firefox OS was bad enough on its own -- turns out they drew a whole new emoji set for it, too! Why, god, why. Here's to hoping the guy suing them for discrimination for being knocked out of running for the CEO position at the last minute just gets "all of Mozilla" in damages, and rights the ship...