Adblock Plus is a free extension that allows you to - among other things - block annoying ads, disable tracking and block domains known to spread malware.
To learn more about what sets Brave apart from its competitors, check out https://www.computerworld.com/article/3292619/the-brave-browser-basics-what-it-does-how-it-differs-from-rivals.html
Disconnect is a browser extension and app that protects against tracking and much more. Several levels of protection available (including a free option).
This Firefox browser extension helps protect your online browsing behaviors from Facebook tracking. It allows you to access Facebook in a ‘container’ browser tab that is isolated from your other browser activity.
HTTPS Everywhere is a Firefox, Chrome, and Opera extension that encrypts your communications with many major websites, making your browsing more secure.
Privacy Badger is a browser add-on that stops advertisers and other third-party trackers from secretly tracking where you go and what pages you look at on the web. If an advertiser seems to be tracking you across multiple websites without your permission, Privacy Badger automatically blocks that advertiser from loading any more content in your browser. To the advertiser, it's like you suddenly disappeared.
It aims at preserving your privacy and anonymity, and helps you to:
-use the Internet anonymously and circumvent censorship;
-all connections to the Internet are forced to go through the Tor network;
-leave no trace on the computer you are using unless you ask it explicitly;
-use state-of-the-art cryptographic tools to encrypt your files, emails and instant messaging.
Tor is free software and an open network that helps you defend against traffic analysis, a form of network surveillance that threatens personal freedom and privacy, confidential business activities and relationships, and state security.