Process isolation isn't actually on yet, it's still opt-in in Aurora.
It also makes everything about the interactive experience worse, or at least it did last week. `perf top` shows a pretty damning story around locks, too. So- we're probably not going to see it until 2015.
I wasn't complaining about lack of process isolation in firefox, I was complaining that process isolation in chrome caused more trouble than it was worth.
FWIW After re-reading my post I believe your mistaken impression was due to lack of clarity on my part, not laziness on your part.