Comment by 0942v8653

pvg pointed[0] me to Safari Blocker[1] which had some issues at first (I got a couple freezes when I installed it) but since then has worked well. It is free and allows you to make your own filters as well.

[0]: https://news.ycombinator.com/item?id=10232639

[1]: Safari Blocker by Luke Li https://appsto.re/us/Y5pt8.i