Outlook.com – integrated shortcut for fail

     

My current brainfuck is really simple to reproduce. Just open outlook.com in your browser, sign in to your mailbox, then press Ctrl + 3, which, by default, is supposed to switch to the 3rd tab in Firefox. Well, not in the case of outlook.com. Here your reward will be a nice error message:

The only remaining question: is this a bug or a feature? 🙂