I believe Adobe cut its portable Flash right before the Vita was released, so Vita does not have Flash, which is annoying. Even with out it, it's missing a lot from its browser, so unfortunately, I just stay off the browser.
@Itwastuesday: It definitely looks like Snake, but I can't imagine releasing two expensive, full-fledged MGS games around the same time. If they did Ground Zeroes, and Metal Gear Acid 3, that'd be no shocker. But hey, we'll find out for sure soon enough.