Rated 5 out of 5 stars

I love this Add-on, using it since forever. However, on Windows 8.1 x64, the first time I download something in a new session, the download fails (<file> could not be opened, because the associated helper application does not exist. Change the association in your preferences.). Happens for random files. Could you please fix this?

Edit: fiddled around with the extensions. Can't really find the culprit, but after reinstalling some stuff it works perfectly now. You're add-on deserves all the five stars!

This review is for a previous version of the add-on (3.5.1.1-signed). 

Uhm... any other extensions?