I liked some of the changes, especially the sync feature in 4 but within
about 2 hours of install ff4 allowed something in and right past av (not
that I'm happy with that as either)  so I went back to chrome, ff 6 seemed
better but still haven't gotten over my experience with ff 4.

Ironically it would have been solved by a noscript switch but it was new
enough to not have one yet. Or at least not one I could find at the time.