Personas are free, easy-to-install "skins" for Firefox. Personas Plus extends that built-in functionality to give you even more control and easier access to new, popular, and your own favorite Personas.
Manage your installed personas (lightweight themes).
This one is a Star Trek theme, using the LCARS interface known of Federation Star Ships (heavily used in The Next Generation and Voyager series). It's got lot of rounded borders and hover (mouse-over) effects, be aware that it may look and feel...
Change your Personas theme on each browser load.
Preview lightweight theme when hover on menuitems in Apply Theme menu.