When you want to ask out of character questions, discuss plots, talk about roleplaying or simply present your character’s bio, this is the place to do so. Small OOC bits may be accepted in the roleplaying forums, but this is the place for the larger posts. Do keep the topics related to the roleplaying however, otherwise go to the General Discussion forum.
The only difference between Campains and FFR is that tho OP sets rules in Campaigns. It could be GRUPS, Warhammer, etc. though in general it follows a FR theme. Rule book does not apply unless the OP so states.