Below is some best free privacy add ons for Firefox and Chrome you must have to protect your privacy.
Best free privacy add ons for Firefox and Chrome is AVG PrivacyFix
For both Firefox and Chrome you can use AVG PrivacyFix. This add on adds a privacy dashboard to your browser that provides access to information about the trackers on the current page. AVG PrivacyFix also can runs on Macs, Android and iOS devices.
Bitdefender’s TrafficLight and Privacy Badger can give you information whether the current page has active trackers.