F11 has become my new favorite button as I do more and more work in web apps on my laptop. The 720p screen isn't exactly spacious, so eliminating toolbars and window chrome really makes a difference in how much I scroll. Also, using one window at a time minimizes distractions.
Use full-screen browsing to get more done in web apps. [Ubuntu Noob]
In Chrome/Firefox/Internet Explorer, hit the F11 key to fill your entire screen with a web page. In Firefox and Internet Explorer, mousing to the top edge of the screen reveals your toolbars. They hide as soon as you mouse away.