Intent to ship: Redirect Tracking Protection (formerly ETP Cookie Purging)

[Steven Englehardt]

As of July 28th we've started a slow rollout of redirect tracking
protection feature (which we've previously called "ETP Cookie Purging") in
Firefox 79 Desktop. We’ve started with 1% of users and will slowly increase
over the coming weeks. The feature is behind the
privacy.purge_trackers.enabled preference.

Safari shipped a similar protection as part of ITP 2.0 [0] and protections
against bounce tracking are currently being discussed in the Privacy
Community Group [1].

Product: Arthur Edelstein is the product manager for this feature

Bug to turn on by default:
https://bugzilla.mozilla.org/show_bug.cgi?id=1648856.

This feature was previously discussed in this "Intent to prototype" thread:
https://groups.google.com/g/mozilla.dev.platform/c/0JjAHt59j7s.

[0] https://webkit.org/blog/8311/intelligent-tracking-prevention-2-0/
[1] https://github.com/privacycg/proposals/issues/6