Early Happy Eyeballs v3 implementation landed in #firefox Nightly, for now off by default. My #ietf 125 presentation: https://youtu.be/l9eId_Yjoew?si=asdQo52kgPPQAuP-&t=4768

#firefox (since v145) #quic stack marks and reflects IP Explicit Congestion Notification (ECN). ~60% of send paths are ECN capable (i.e. reflect ECT0 and CE). ~40% of send paths bleach the ECN signal. Some small percentage of send paths blackhole the entire […] [Original post on mastodon.social]