

I have specific containers for work, banking, google domains, and youtube. I also have twitter and tiktok containers in case I need to open one of their links and isolate them. Oh and the separate facebook container extension.
Having said that, I believe FF now prevents cross-site tracking, so technically containers may no longer be needed. I just continue to use them for peace of mind.
lemm.ee mostly leaves it up to the user to block communities and instances, so you get wider initial reach. The admin is cool too and keeps the instance maintained regularly.