uBlock

Avira Browser Safety protects you from malicious websites & invisible trackers. It blocks annoying and infected ads, stops malicious & phishing websites, prevents companies from tracking you, prevents browser hijackings, and more.

Privacy Badger is an extension that automatically learns to block invisible trackers. Instead of keeping lists of what to block, Privacy Badger automatically discovers trackers based on their behavior.

LibRedirect is an open source browser extension designed to redirect the loading of popular destinations on the Internet like YouTube, Twitter, and Instagram automatically to privacy-friendly frontends and backends websites.

xBrowserSync is an open-source tool for syncing your bookmarks and browser data between your desktop browsers. It respects your privacy and gives you complete anonymity: no sign-up is required, and no personal data is ever collected.

Decentraleyes is a browser extension that emulates Content Delivery Networks (CDN) locally by intercepting requests and injecting them into the environment.

HTTPS Everywhere is a browser extension created by EFF and the Tor Project, which automatically switches thousands of sites from insecure "HTTP" to secure "HTTPS."