A persona/theme is like the look of your firefox browser. You can choose from thousands and thousands of options for the one that best fits you. Adding a theme is very simple. Just go to this site, and pick the on thats best for you!
Here is the one I picked. It is the german flag over a soccer field. Themes are a very nice feature, and will make your firefox feel more like you.
Here is the one I picked. It is the german flag over a soccer field. Themes are a very nice feature, and will make your firefox feel more like you.