I just registered to support.mozilla.com to ask a different question, but the site offers me a Swedish site. My language settings in Firefox are en-US and en, and I'm located in Finland. Would be nice if s.m.com used the browser preferences, or at least had an immediate and clear option to change the language on the first page. This might have been because my ipv6 is routed through Sweden, but AFAICS support.mozilla.com uses ipv4 only.