Rated 5 out of 5 stars

per Mark Craig el mar. 29, 2011 · enllaç permanent

For those who want to use it in Firefox 4 and cannot yet, don't bother begging! The author already knows and is working on it:

"Feature list below has not been fully updated for 4.0 release, update coming soon."
(from the mrtech.com Web site, main page for this extension)