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A new browser extension called the「Facebook Container」lets Firefox users isolate their activity on Facebook to Facebook.com, making it more difficult to track users「 actions elsewhere on the web … The hope is that someone searching for and booking a trip wouldn」t then cause related ads to appear on your Facebook feed, for example, without having to go ahead and delete Facebook altogether … Mozilla noted in the blog post that websites that allowed a user to create an account and log-in through Facebook will not work properly within the Facebook Container.