After trying to check what else updated and searching around, it seems this bug is related to sqlite3:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=949644 After downgrading to libsqlite3-0_3.30.1-1, firefox starts again.
After trying to check what else updated and searching around, it seems this bug is related to sqlite3:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=949644 After downgrading to libsqlite3-0_3.30.1-1, firefox starts again.