Rated 3 out of 5 stars
Please remove the notification box. It is superfluous and can cause shutdown hangup. If you attempt to close windows 7 64bit without first closing Firefox the 4.0 version will prevent shutdown. 3.5 works fine on Firefox 5 with many thanks to Martin Miller.This review is for a previous version of the add-on (4.0.1-signed.1-signed).