it's not related to your browser john (well it could also be a mix of problems on your pc) but just that the forum is getting too many visitors that it can't cope. best way to think about it is this forum currently has a small thin hallway, when only 2/3 people try to go down that hallway then it's fine but when 20-30 people all at once do then you get stuck and it's very slow. they could buy a new wider hallway to fit the amount of people coming through but that costs more money.
it does get annoying but multi tasking sorts this issue.