Good app but closed tab list does not work Rated 4 out of 5 stars

This is one of my must have applications, very useful.
But... closed tab list button does not work in FF12 in win xp sp3, I change the TMP settings to no avail... the button remains grayed out.

This review is for a previous version of the add-on (0.4.0.1.1-signed). 

look at our troubleshooting page for help
http://tmp.garyr.net/forum/viewtopic.php?f=2&t=11023