A theme is a type of Firefox add-on which changes the visual appearance of Firefox. This article describes how to find, install and manage themes in Firefox.

What are themes?

A theme changes how Firefox looks. A theme could simply change the toolbar's background colors, change how buttons look, or make Firefox look like a completely different program.

There are two types of themes available for Firefox:

• Background themes (previously known as Personas) - lightweight themes that can change the color scheme and background image of the Firefox toolbars.
  
  
• Complete themes - more customizable than background themes, but larger to download.
  

How to install themes

1. At the top of the Firefox window, click on the Firefox buttonOn the menu bar, click on the Tools menuAt the top of the Firefox window, click on the Tools menu, and then click Add-ons. The Add-ons Manager tab will open.

2. In the Add-ons Manager tab, select the Get Add-ons panel.
3. To see more information on a Featured Persona, click it. You can hover it to preview it and then click the green Add to Firefox button to install it.
   • You can also browse all Personas by clicking the See all link, all themes by clicking the See all themes link or search for a specific theme by using the search box at the top. You can then install any theme you find with the Install button.
4. Firefox will download the requested theme and may ask you to confirm that you want to install it.
5. Click Restart Now if it pops up. Your tabs will be saved and restored after the restart.

Managing themes

How to switch themes

When several themes are installed:

1. At the top of the Firefox window, click on the Firefox buttonOn the menu bar, click on the Tools menuAt the top of the Firefox window, click on the Tools menu, and then click Add-ons. The Add-ons Manager tab will open.

2. In the Add-ons Manager tab, select the Appearance panel.
3. Select a theme in the list.
4. Click the Enable button.
5. Click the Restart now link if it pops up. Your tabs will be saved and restored after the restart.

How to remove themes

If you want to remove a theme, see Disable or remove Add-ons.

Troubleshooting

• If you have a problem with Firefox, it may be caused by your theme or your theme's interaction with other add-ons. For troubleshooting instructions, see Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems.
• If you cannot install a theme, see Unable to install add-ons or extensions.

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