I’m pretty sure Adguard is more than just a browser extension. They have an app for many different OSs, which I think makes setting up their DNS ad blocking on your devices easier and simpler. There’s also Adguard Home, which is similar to pi-hole, if you want to self host a DNS ad blocker.
They also offer a VPN.
So you aren’t paying just for a browser extension necessarily.
Miru that uses torrents vs. the other Miru.
Thought I’d add this for anyone curious. Been using the Miru with torrents and loving it. It’s even better if you use it with an AniList account to keep track of what you’re watching.