I do that, I'm just used to resizing windows so I can see various apps at once. And, of course, only one browser window at a time in the LastPass browser, which is my main browser. I know the native browser handles multiple windows.

And LastPass is a little funny... if you long press and return to it, you'll return to the browser specifically. You have to hit the icon from the home page (or in your app menu) to reach the vault in one click. If you are in the browser, it's menu-other-open vault to get to the vault. So it's actually quicker (for this app) NOT to do the long-hold on the menu button.