[Osiris]

Firefox is not optimized for widescreen or dualscreen monitors leaving lots of empty space when surfing the Internet. Jonathon Weare came up with a solid way to change the layout of Firefox to suit the needs of widescreen monitors by moving several elements of Firefox to different positions.
His first idea was to move the bar with all the tabs from the top location into the sidebar which adds two benefits. The first benefit is that the space on the sides is used to store elements that are needed for browsing while the second is that the tab bar is removed from the top location adding more space for the actual website.
The process is not that complicated, all you need is one Firefox extension and edit a single configuration file of Firefox. Besides this obvious change he is suggesting several more changes that remove objects from the menus which are generally not needed that much.
I do not want to get into to much detail here but he manages to stuff everything into one tiny menubar which can be done by following his instructions. I decided to use this setup on my widescreen notebook. Take a look at the following image to get an idea of how it could look like. Click to view the full size.

The website has a few more sample layouts featuring one for dual screen monitors which looks really great.