You can view your tabs in a number of different ways:

• Wall – like a TV store. select the desired tab (“TV screen”) from a wall.
• Grid – the tabs are aligned on a grid.
• Row – the tabs arranged in a row.
• Cycle – rotate between tabs.

Activating it is easy.  Either hit the toolbar button for it, or hold the Ctrl key down and then hit the Tab key.  If you want to keep it front and center, just hit Ctrl + Q.  From the options, you can also set the size of the tab switcher (just in case you don’t like it being full screen). 

All in all it provides a new visual method for quick tab switching that is both useful and beautiful at the same time.  Currently FoxTab is only for Windows users, and is an experimental add-on.  If you wish to download it, and try it out – you can do so at the Firefox Add-ons site.