Rated 5 out of 5 stars

per chiappa el ago. 11, 2015 ·

I tried the manual about:config method which didn't work. Installed this, works great and extremely useful/easy to use.
I am on version 39.0.3 of Mozilla Firefox for Ubuntu.
Thank you very much!

This review is for a previous version of the add-on (0.8.6).