idn domain not showing correct in firefox

Question

I have bought this domain bilvärdering.nu

http://xn--bilvrdering-o8a.nu/

in firefox adressbar it show up like http://xn--bilvrdering-o8a.nu/ but in chrome and IE it show up with the correct characters

http://bilvärdering.nu/

How can I make firefox show correct characters in its adressbar?

Answer 1

It's a security feature: http://kb.mozillazine.org/Network.IDN_show_punycode

The reason is, that there exist unicode characters that look exactly like latin characters, but would point to a totally different domain if used in an URL, allowing for phishing attacks.