In response to the Facebook data harvesting scandal, Mozilla has launched an extension for its Firefox Browser which helps you segregate your web activity from Facebook's prying eyes by isolating your identity into a separate "container." This makes it far more difficult for Facebook to track your activity on other websites using third-party cookies.
According to Mozilla this extension :
"Prevent Facebook from tracking you around the web. The Facebook Container extension for Firefox helps you take control and isolate your web activity from Facebook."