Yes it does. Here's a list with most important instances and their restrictions: https://github.com/maltfield/awesome-lemmy-instances
It's probably because you made an account on an instance that blocks nsfw. You need to make an account on a different instance that allows nsfw and does not defederate the particular instance you would like to browse. Or just make an account on the instance you care about the most.
Either way, another federation design decision to confuse the hell out of all its users.
People complain about Firefox performance and site compatibility all the time and I have no idea what they are talking about. I use both it and other browsers all the time and Firefox for me is the better one.
The way in which the Active and Hot filtering has been stale for days on end has been bugging me so much since I started using Lemmy. I've been scrolling past these 3 posts in that exact order every day since they first appeared 4 days ago. Is there any way to fix this?
Unfortunately this might not be true. Instances need maintainance. If the one that spun it up doesn't dedicate time and resources to it your experience might just be worse than average.
In my case I was having all kinds of timeout issues and occasionaly instance went down. Moved to a bigger and more active one and never had issues since.