I think this would be a really cool feature — able to access browser commands through the URL bar. (similar to sublime-text) commands that can be called simply by typing their subsequence names.
hotkey -> type in URL bar
":hs" — h i s t o r y
":fnd" — f i n d
":n" — n e w t a b
":blks — b l o c k s c r i p t s
I feel this feature could offer great extensibility advantages, and a further talking point to help with browser adoption.