This post seems to have some more detail on what that feature actually is.
Firefox
A place to discuss the news and latest developments on the open-source browser Firefox
This feature will be implemented via loopback starting with version 127.0.0.1
/s π
It sounds like it will be really hard to differentiate bounce trackers from totally valid patterns like routing through federated identity servers π€ I wonder how they're dealing with that
Source: https://blog.nightly.mozilla.org/2024/05/09/screenshots-these-weeks-in-firefox-issue-160/
Weβre working on a new anti-tracking feature: Bounce Tracking Protection. It works similar to the existing Cookie Purging feature in Firefox, but instead of a tracker list it relies on heuristics to detect bounce trackers.
Itβs based on the navigational-tracking-protections spec draft in the PrivacyCG[1]
[1] https://privacycg.github.io/nav-tracking-mitigations/#bounce-tracking-mitigations