I'm against this. There was a PR for this that turned sour so I wouldn't link it. Basically, it's pointless to load tons of useless Python modules just to percent encode a query; a trivial script should do. Also, this is already possible in googler with two extra keystrokes (`O, <enter>`) and two more to quit (`q, <enter>`); an option wouldn't save much (well, you can add a shell alias, but you can also write the aforementioned script in roughly the time you add the shell alias). Or, if you want to do everything in the browser, why not start in the browser in the first place... Piling on yet another feature that's disconnected from every other feature (with the possible exception of country and language selection, but even that is a tenuous connection, and you didn't mention that explicitly so I wouldn't assume you need it) doesn't feel right.
However, if there's strong demand (say, we get two more independent requests), maybe we can add it.