Rated 5 out of 5 stars

I downloaded it from here: http://bitbucket.org/satyr/ubiquity/downloads/tip.xpi
That makes it work in FF 4.0.0b
This add-on needs to be continued.
Before you hear about it you didn't desire it, after you hear about it you can't live without it!

This review is for a previous version of the add-on (0.6).