Rated 4 out of 5 stars

very useful when you want to stop and you normally can't

it can be made to work with FF3, hasn't caused any problems in mine, but it could

it is made for FF2 but you can change a file inside so it thinks it works with FF3 but it is really dangerous and could stuff up Firefox deleting ALL profile data (or worse corupting OS)

try downloading as a file, changing extension .zip, open install.rdf and change the max version for firefox to 3.0.*
save, rename as .xpi and drag to addon windows

remember, this is REALLY dangerous

This review is for a previous version of the add-on (1.2).