How to detect if a user is using tracking protection in Firefox 42+
问题 Firefox has launched a feature called Tracking protection in v42.0. It blocks several tracking scripts such as Google Analytics, Marketo, LinkedIn, etc. I was trying to detect it through navigator.DoNotTrack , but it returns unspecified in both cases – browsing in regular mode, and browsing in private mode – using Firefox 42.0 on Mac. How can I detect in JavaScript whether a user is viewing the website with the Tracking protection on, since navigator.DoNotTrack fails? 回答1: navigator