Librewolf 101 is now available in ports and as a binary package for 7.1.
Firefox 101 bumps icu4c, nspr and nss libraries (and so Librewolf), so I
had to update them too. Those bumps are minor, so updating them should
not cause issues, and I tested them with Gnome and Thunderbird. That
said, update them on your own risk:
pkg_add -u icu4c nspr nss librewolf
Alternatively, consider moving to -current and building Librewolf from