Sometimes Tab works, sometimes it doesn't, in the way you've suggested. Again, I must be missing something/blunder on my part. It's sporadic when it works. For

Sometimes Tab works, sometimes it doesn't, in the way you've suggested. Again, I must be missing something/blunder on my part. It's sporadic when it works. For instance, on OS X, one can "Change the way Tab movies focus". The "viewport" being the container of the Web page (or the container of your current DOM "window"), underneath your address bar or bookmarks. Basically, the Web page itself. I'm using the term "viewport" since, ideally, I don't truly want to Tab into the Web page itself because this assumes I want some element in the page, like a link. I'm prefer to be able to Tab to the "viewport" (Web page) and simply scroll, say, or use vimium commands. But more often than not, when I Tab from the address bar, I get either the bookmarks bar or the apps bar (Chrome). Firefox gives me similar behavior. For the most part, I'm trying to determine if this is a limitation of OS X or a limitation of each particular browser.