Rated 4 out of 5 stars
I can't say anything more positive that wasn't already said by others. The only thing I'll add is that while it does throw up different personas, it only seems to throw up the same 9 or 10. If I use firefox 20 times, the same 2 or 3 personas will show up at least 12 of those times with a few less-used ones sprinkled in for the other eight. There are a lot of other personas I installed that have never come up, ever.