Rated 5 out of 5 stars
This is an excellent add-on. I am a heavy user of favorites, and it's great to have access to the same favorites whether I use IE or Firefox. It works super and without it I might not even use Firefox because of my heavy reliance on Favorites and the number that I created in IE before I started using Firefox.
Having two separate lists would be a nightmare, and this seamlessly brings both together.
Great job, Alex!