Rated 5 out of 5 stars

Stills sounds like an excellent asset ... would look good on my new ff 4.0!

But, both "Continue to Download" links produce the following Firefox error:

"The add-on from mozilla.org could not be installed because it does not match the add-on Firefox expected."

I bookmarked it, and will check back. :)

This review is for a previous version of the add-on (0.110123.17.1-signed.1-signed). 

Rated 5 out of 5 stars

Sounds like it would be of great interest, but it wouldn't install for me (v3.6.13):

"Firefox could not install the file at

https://addons.mozilla.org/en-US/firefox/addon/6231/contribute/roadblock/?src=oftenusedwith&version=0.110123.17

because: Invalid file hash (possible download corruption)
-261"

This review is for a previous version of the add-on (0.110123.17.1-signed.1-signed).