I second that feature request. Three reasons:
1. While Alfred recognises URLs when you just open them in the default browser, it does not do that, when you use a custom workflow, so you always have to type "http://"
2. The built in feature does autocomplete, based on the URL cache
3. I always start typing the URL and then it comes to my mind that I would better use a different browser for that specific address. So it would be nice if we could use it similar to the file interface. Typing return would just open it in the default browser, while cursor right gives me a list of the installed browsers and preferable their incognito modes to chose from. In a perfect world Alfred would also not cache the address, if I select a browser's incognito mode.
