(BTW, I really wish projects wouldn't have unnecessary codenames. Search engines could deal with people searching for "foosoftware 11" rather than "barcodename". Now we have to memorize numerous codenames for one thing, and frequently translate back and forth between codenames and the actual name and version number.)
doesn't seem to be finding `firefox-esr` in current Debian Stable:
https://packages.debian.org/bullseye/firefox-esr
Also note that there are security updates to the version in bullseye:
https://tracker.debian.org/pkg/firefox-esr
(BTW, I really wish projects wouldn't have unnecessary codenames. Search engines could deal with people searching for "foosoftware 11" rather than "barcodename". Now we have to memorize numerous codenames for one thing, and frequently translate back and forth between codenames and the actual name and version number.)