Version 2026.04.27.1+dfsg-1 of phoenix is marked for autoremoval from testing on Mon 15 Jun 2026. It depends (transitively) on firefox-esr, affected by #1127569. You should try to prevent the removal by fixing these RC bugs.
A new upstream version is available: 2026.05.21.2high
A new upstream version 2026.05.21.2 is available, you should consider packaging it.