Rated 4 out of 5 stars

Great Extension. However, I give it a nine because when I tried turning it off it didn't work. So, I tried to uninstall it. It shows it gone in the Add-on list but it still shows up in the message window. Wait-
later it disappeared. (Next Day - after it disappeared, it appeared again. Any way to get rid of it without deleting Thunderbird and reinstalling it?

This review is for a previous version of the add-on (3.2.0.8). 

Thank you. By turning it off do you mean link capturing or by disabling the extension?

It sounds like you might have a corrupted profile. ThunderBrowse won't try to re-enable itself after you disabled it or uninstalled it.

You might want to take a look at this:
http://kb.mozillazine.org/Unable_to_install_themes_or_extensions_-_Firefox#Corrupt_extension_files