Work on Firefox's Tracking Protection feature continues as Mozilla plans to give users more control over the feature by adding tracking groups to the system that users can allow or disallow individually.
Tracking Protection is a new privacy feature of Firefox that Mozilla launched in Firefox 42 stable. The mode blocks connections to trackers in the browser's private browsing mode to limit exposure while using the mode.
Private browsing itself takes only care of local data, and the addition of Tracking Protection expands this by blocking remote trackers as well.
Tracking Protection updates will land in the next stable version of Firefox, and Mozilla is at work to improve the mode further in future versions.
The following mockup highlights the improvements (check out
bug 1219365 to track the implementation)