Very useful! Rated 5 out of 5 stars

A great add-on, that I use all the time! It makes my life so much easier when I can see at a glance if a page I am working on still validates. There must have been a lot of hard work gone into building this add-on. Thank you!

Note: The Linux version (which I use) is available from the site itself.

This review is for a previous version of the add-on (0.8.6.1).