Setting ctrl+enter in Firefox address bar to use .com

Thanks to Ray's comment on this page I found that I need to set browser.fixup.alternate.suffix to .com in Firefox's about:config to get the behaviour I want on my HTPC. I've mostly been using english OS:s on my other computers, but the HTPC has a Swedish Vista and Ctrl+enter in the address bar goes to .se which is not good behaviour.