Dear Community, Dear Bridge Operators,  an updated obfs4proxy package was pushed to Debian bullseye-backports about 2 weeks ago and solves a security issue and a partial incompatibility between Tor browser and bridges [1, 2, 3]. See also the E-Mail from meskio [4].  The new version, 0.0.13-1, will be available in Ubunutu jammy, planned to be released in April as 22.04 LTS.  I would like to get this version into focal-backports, as focal (20.04 LTS) is a popular system.  For this reason, I filed a bug with Ubuntu.  https://bugs.launchpad.net/ubuntu/+source/obfs4proxy/+bug/1967003 Anyone who has experience with Ubuntu packages and backports is very welcome to help. Thank you and kind regards,  wurstsemmel [1] https://lists.torproject.org/pipermail/anti-censorship-team/2022-January/000... [2] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/40804 [3] https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/obfs4... [4] https://lists.torproject.org/pipermail/tor-relays/2022-March/020447.html