There are known issues with the Firefox, Chromium-bin, Midori and Epiphany web browser packages and mports that need to be corrected. (detected late, sorry). Issues were created on github in mports repo to track these. (mesa issue, see below) i386 and amd64 packages are available, but there was an issue with our mesa version. It has been updated in mports but new packages haven't been built yet. When upgrading from a previous release, be sure to get on at least MidnightBSD 2.2.5 before jumping to 3.0. There are issues with usr.bin/lex on some systems. When doing a major upgrade from 2.x to 3.x, sometimes it's necessary to disable Perl builds in usr.bin/Makefile. If you get an error with buildworld in src/rescue/rescue, try removing camcontrol and df from the makefile temporarily.