We've been dabbling in this Firefox Browser add-on called "Personas" which is an easy to do theming of your browser and you can use submitted themes at the Personas page to spruce up the look of your browser. Especially if you're using the latest browser release, which is 3.6.3, it will be easier for you change the look of your Firefox browser. This is a cool way of giving your Firefox browser that "airsofty" or "tactical" look.

We have submitted our own Persona, which is just a simple one which you can use for your own Firefox browser below. It's still a simple one and you can also make one for your own purposes. For this, we used the Pimp My Gun website to create a custom gun to come up with that look. We'll try to make more Personas themes in the future if this design gets stale for you. You can use the design below by clicking on it.

There are already other airsoft designs for you to choose from, just click on the screenshot below to get them.

If you want to submit your own, they have easy to understand instructions available. Just make sure that you don't do any copyright violations.