There are screenshots of the mod log showing the “Moderator Code of Conduct” admin account going in and reverting the NSFW settings on multiple subs. Yeah screenshots aren’t always trustworthy but that’s really the best you’re going to get with this. It’s not out of character for Spez though, so I’m not giving Reddit the benefit of the doubt.
It gets slightly annoying when you want to use a non-recommended extension (like RES). You either need to swap to Nightly or something like Fennec (on F-Droid). Then you must curate your own collection of extensions on addons.mozilla.org and finally set your browser to pull from that collection.