Rated 5 out of 5 stars

The latest developer version (automatically updated) 0.5.0.0b4 works with 18.0.1 (current released), 19 beta, 20 Aurora and 21 Nightly. Way to go!

This review is for a previous version of the add-on (0.4.2.0.1-signed).  This user has 3 previous reviews of this add-on.