I believe it has something to do with security, when browsers first added unicode url support there were issues with hackers and spammers using blank and lookal

I believe it has something to do with security, when browsers first added unicode url support there were issues with hackers and spammers using blank and lookalike unicode characters to trick people into visiting shady domains. Related: http://www.mozilla.org/security/announce/2009/mfsa2009-50.html http://www.mozilla.org/security/announce/2009/mfsa2009-50.ht... I'm not 100% sure of this though, hopefully someone more knowledgeable can chime in.