I picked up a slightly older Raspberry Pi (3 model b v1.2) and loaded up Raspian via the NOOBS installer. Then I installed Pi-Hole on it to be the network-wide adblocker.
https://pi-hole.net/
It's working really well so far and does speed up browsing (YMMV based on where you browse, of course). I have always used Firefox + Ublock Origin or similar, but this will do all devices on the network, as well as speed up your VPN a bit if you're away from home and connecting back. Check it out if you haven't...cool stuff.
finally got a raspberry pi to play with
Re: finally got a raspberry pi to play with
If you run pfSense you can do similar blocking using pfblockerNG (in case someone didn't know)