How useful is browser? Are there any plugins like uBlock Origin?
SeaMonkeys build process still depends on Python 2.7, which port has set an EXPIRATION_DATE on 2020-12-31 (so it should have been deleted long ago - "almost one year no update" was enough to kick of the SeaMonkey port, while an update was known to be around). You won't have luck to add a new port that depends on a port that has to be deleted.On a different subject, have you considered making this port official?
[00:02:24] Warning: (www/seamonkey): Error: www/seamonkey depends on nonexistent origin 'devel/autoconf213' (moved to devel/autoconf2.13); Please contact maintainer of the port to fix this. [00:02:27] Error: Fatal errors encountered gathering initial ports metadata
Rename autoconf 2.13 port directory, package, and command all to
autoconf2.13 just like ports like perl and python.