https://ublockorigin.com

Install this wonderful extension to save hours of your time and gigabytes of your bandwidth.

Any good alternative for Safari?

I knew I would get alternative browser recommendations because of my phrasing... but I was also looking forward to them!

https://github.com/notracking/hosts-blocklists

Use this for network wide blocking of all sorts of virtual garbage. Not only for safari, but all your locally connected devices.