Yep, I have my PiHole running on a Pi2 still.

You're underestimating these websites though. I already run into sites that arbitrarily throw up a "Firefox not supported" gate until I switch user agents. That will only get worse.

I'm still very concerned about Firefox's funding majority coming from Google search, especially after the antitrust shutting it down. https://slashdot.org/story/431592

We're headed for dark times for the open internet.