By now, many of you know about Firefox personas (also called Themes), which allow you to add a little spice to your browser window. What you may not know is that although they are easy to preview and install (go to getpersonas.com, find one you like and click “Wear it”), uninstalling or changing to a previously installed persona might not be so clear.
So, here’s how you manage your Firefox personas:
Open Firefox and go to Tools>Add-ons. (you can also hit the key combo Ctrl+Shift+A to open the Add-ons page)
Now make sure you’re on the appearance tab.
You’ll see all of your previously installed personas here. To use a previously installed persona, simply click Enable. To remove an existing persona click Remove. It’s that easy!