ublock origin is the original creator maintaining the code. it is better than ublock!

https://addons.mozilla.org/en-US/firefox/addon/ublock-origin...

Some others potentially worth installing:

https://www.eff.org/https-everywhere

https://www.eff.org/privacybadger I prefer this over Ghostery. You can also for the most part replicate Ghostery by just downloading an appropriate filter for Ublock Origin.

https://addons.mozilla.org/en-US/firefox/addon/betterprivacy...