REMEMBER Each theme has a version number. The designer uses this number to keep track of the themes. You don't need to worry about it; just remember that the higher the number, the newer the theme.           Troubleshooting Themes If you experience a problem in Firefox after installing a theme, you can launch Firefox in a special Safe Mode that temporarily disables the current theme and resorts to the default. Safe Mode also disables your current extensions (see Chapter 20 for more information about extensions). If the problem isn't present in Safe Mode, either your theme or one of your extensions is causing it. Try disabling the theme or your extensions one by one (from the Theme Manager and the Extension Manager, respectively) until the problem disappears. To open Firefox in Safe Mode in Windows, shut down Firefox if it is currently open, and then choose Start Programs Mozilla Firefox Mozilla Firefox (Safe Mode). To open Firefox in Safe Mode on a Mac, you need to enter a special command into the Macintosh Terminal. First, open the Terminal from Applications Utilities Terminal. Then type the following and press Enter:   /Applications/Firefox.app/Contents/MacOS/firefox -safe-mode If you installed Firefox to a different location, you need to modify the path accordingly.             Uninstalling Themes If things just aren't working out between you and a particular theme, you can uninstall it from the Theme Manager (Tools Themes). Simply select it in the list and click the Uninstall button at the bottom, and then click OK when Firefox asks you to confirm. It's okay to uninstall the theme you're currently using - Firefox falls back to the default theme, and the uninstalled theme cries on a friend's shoulder - but you need to restart Firefox before the change takes effect. Just remember you can't uninstall the default theme.           Chapter 18: Tailoring Your Toolbars If you've ever struggled to set the clock in your car - just turn off the AC and press Eject while going 61.5 mph, of course! - you'll appreciate the toolbar customization features in Firefox. The toolbars are those collections of buttons and text boxes that sit at the top of every Firefox window. Like your car's