I'm currently testing https://piefed.social/u/Libb all my new participation will be posted there, at least for the time being.
A 50-something French dude that's old enough to think blogs are still cool, if not cooler than ever. Also, I like to write and to sketch.https://thefoolwithapen.com/
The same that pushed you to stop using FF the browser to begin with?
I mean, if you worry about FF/Mozilla doing naughty things with your browsing data, should you not worry as much if not more about the data you ask them to sync for you and save on their very own servers?
For the time being, it's not a definitive decision as I'm waiting to see what they will do next, I've quit using FF (using Waterfox instead) and for me not using FF obviously also meant to stop using their sync feature.