Rated 5 out of 5 stars

On one of my profiles I regularly have sessions that take up 60+ tabs, each for different purposes. Session Manager was incredibly useful for this, but now that Mozilla decided to unilaterally switch to WebExtensions without making sure that the most popular extensions actually worked, all of these sessions are gone now. Please fix whatever is preventing Session Manager from being ported to WebExtensions so that this can work again!!!

This review is for a previous version of the add-on (0.8.1.13).