It's difficult to pick a single one.<p>uBlock Origin[0] is probably the one with biggest impact. I assume most of the HN folks know it, but It's a general purpose blocker that can block network requests and DOM content with support for AdBlock plus rules and host files. FilterLists[1] is a nice resource to find lists you can subscribe to.<p>I also like Privacy Settings[2] a lot. It's a GUI for changing all the built in features Firefox already has, allowing you to quickly switch options on and off as you like.<p>0: <a href="https://github.com/gorhill/uBlock/" rel="nofollow">https://github.com/gorhill/uBlock/</a><p>1: <a href="https://filterlists.com/" rel="nofollow">https://filterlists.com/</a><p>2: <a href="https://github.com/schomery/privacy-settings/" rel="nofollow">https://github.com/schomery/privacy-settings/</a>
You may find something you like here:<p><a href="https://www.privacytools.io/" rel="nofollow">https://www.privacytools.io/</a>