Rated 5 out of 5 stars

Seems good so far but I found a small bug: when FS is on and I type something into the location bar and then clear it by backspace, the drop-down list remains still open. When FS is off the drop-down list goes away normally.

This review is for a previous version of the add-on (2.19.1-signed). 

You're right, it's now fixed in the just-released v2.21