I've got a couple VPSes, hosting
- Mailcow, because email is identity.
- Asterisk, because phone #s are also identity.
- Matrix-Synapse, for personal messaging even though XMPP is probably better.
- ttrss, even though it's junk software with a jerk developer.
- A bunch of self-developed web apps
Self hosting email is obnoxious, but it's also one of the only remnants of the traditional distributed internet that's still broadly accepted.
Firefox died long ago.
It was an engine fight, and Mozilla decided not to participate.