Rated 5 out of 5 stars

per custom.firefox.lady el gen. 31, 2016 · enllaç permanent

Works well. Appears to work with Process Separation (e10s). Doesn't use FUEL API (which is being removed). Recently updated (meaning developer is currently active). It would be even better if it were restartless, but still excellent. Update: Alternatively, Classic Theme Restorer now also contains a restart button (so I switched to using that).