Updated: June 15, 2009
Personas is a Firefox extension that add lightweight theming to the browser. It won't improve security or solve financial crises, but it can infuse some color to your browser, bringing a touch of fun into the routine of Web life.
Personas were born with the notion that good themes are hard to find, browsers are no longer just a tool to display webpages, and that there's a growing demand for a more integrated Web experience.
Get Personas
Personas come as an extension. You can find it on the official site. It is available for Windows, Linux and Mac. By the way, if you need help installing Firefox addons, you might wanna take a look at this tutorial. The first time you restart Firefox with Personas installed, it will come up adorned in shades of blue, one of the many faces, a.k.a. personas that your Firefox know wears.
Changing Personas
Personas add a quick-switcher button into the left corner of the status bar. Simply click on the little fox icon to open the Personas menu. As you can see, the default theme is known as Groovy Blue.
You can now start exploring the themes. You can either view an entire gallery or focus on the most popular or new, for instance. If you check the Default box, whatever selected theme is on will become your default one. Under Preferences, you can change the way Personas feel and look and how they integrate into the menu.
Now, here's a number of sample Personas you can choose. Personally, I liked the nature themes the best.
A little zoom:
Conclusion
Personas are an innocent fun. They do add a bit of overhead to the browser, but if you appreciate art and like a bit of color, then Personas are a good choice to spice up the monotone scheme. Like I've said earlier, nothing fancy, just some cute pleasure.
Cheers.