AVG Anti Tracking extension?

Yes, you can find instructions here [https://support.avg.com/SupportArticleView?l=en&urlName=AVG-installing-AntiTrack-browser-extensions&supportType=home Installing the AVG AntiTrack browser extensions] Do not confuse it with the older AVG Online Security, which is no longer supported. [https://support.avg.com/SupportArticleView?l=en&urlName=avg-online-security-firefox-discontinuation-faq&q=firefox+extention&supportType=home#:~:text=Important%3AWe%20have%20ended%20support%20of%20our%20AVG%20Online%20Security%20browser%20extension%20for%20Mozilla%20Firefox%2E%20If%20you%20are%20running%20AVG%20Antivirus%2C%20note%20that%20AVG%20Web%20Shield%20helps%20protect%20your%20Firefox%20browser We have ended support of our AVG Online Security browser extension for Mozilla Firefox]

Firefox supports it, but the same can't be said about many sites — it could get you locked out of networks of big vendors who won't trust the connection etc. — I'd personally advice against using it.