Rated 5 out of 5 stars

i was looking up for such a add ons and finally found this but it does not work fine in firefox 9. i cannot add any thumbnail when i click to add a thumbnail, unfortunately it will freeze. it does not work good at all.

This review is for a previous version of the add-on (1.4.2.1-signed). 

Thank you for your review. It should work fine in Ff 9. May be there is a conflicting extension installed?