said by whats that :I installed this update on my Imac (Lion) and Firefox 13 became SLOOOOW and unresponsive.
I had to utilize System Restore! and go back to Shockwave Flash 11.2 r202.
Initially, after update, every time I tried to open Firefox 13 it was hanging and freezing ... eventually, got the "A script is running" message(s) - but even after I stopped the script(s), everything kept freezing - finally, checked Task Manager and 13 (no exaggeration) Adobe's were running! End Process x 13 times later (plus deleting "plugin container), several more attempts, 2 computer restarts and finally just got fed up.
THANKFULLY I chose to set a restore point before updating!
By the way, am posting here, after wasting another 10 minutes trying to notify Adobe. They make it way too hard for non-technical users to try and convey this type of feedback.
Thanks for listening.