October 21
Awesome news! I've been working very hard on getting Revert Site working again, & succeeded! The new version uses a different method to get the old site back than before and this time should have fewer side effects (video and audio calls should work ok for instance)
https://www.facebook.com/fluffbustingpurity/posts/10158511298327559 October 22
Disaster strikes for Revert Site. It looks like Facebook have closed the loophole that the Revert Site extension was using to get the old Facebook design back.
I will try and find a way around it, but this could be the end of the old design for us, unless you are a Page or Group admin, and have the option at the top left of the group/page itself to revert for 48 hours.
https://www.facebook.com/fluffbustingpurity/posts/10158513955812559