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A theme is a type of Firefox add-on that changes the visual appearance of Firefox. This article describes how to find, install and manage themes in Firefox.
What are themes?
A theme changes the appearance of Firefox, such as the color scheme and background image of the toolbars. The color scheme of menus and built-in pages will follow, based on whether the text color on your toolbar is light or dark. Some websites also will follow the same color scheme.
Choosing a theme
Firefox comes with a set of themes to choose between, that support both light and dark modes. You can also install themes created by our community members through add-ons.
Select a website theme in Firefox settings
You can select from Light, Dark or System appearance for websites in Firefox settings. If you’re using a Firefox Theme, this will toggle the light versus dark version of that theme. It will also change the color scheme of menus and built-in pages. To learn more, see Change website appearance settings in Firefox.
The System setting will match what your Operating System is set to (light or dark), so if it automatically switches to dark with certain lighting, then Firefox will update as well.
Select a theme from the New Tab customization panel
You can view a selection of Firefox themes in the customization panel of the Firefox Home / New Tab page.
- Open up a new window or tab.
- Click the customize button in the bottom right corner of the New Tab page.
- Under Appearance, select a theme or click
- Select for a snapshot of Firefox themes.
Select a theme from the Add-ons Manager
- Click the menu button , click and select .
- Scroll through the suggested themes or visit addons.mozilla.org to browse more themes.
- Click the theme's author to see more information about it.
- Click the button.
- To install a theme from addons.mozilla.org, click on the theme and select the button on the resulting page.
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- Firefox will download the requested theme and may notify you that it has been installed.
Note: If you simply want to change the color scheme, Colorways by Firefox is a collection of themes you can choose from.
You can also install Mozilla's Firefox Color extension to change the color of tabs and toolbars, add a custom background, and more. See the Firefox Color Homepage for details.
Managing installed themes
If you have installed a community theme, you can manage it through add-ons.
Click the menu button , click and select .
- The theme being used will be shown at the top, under Enabled.
- Other available themes will be listed beneath, under Saved Themes.
Reset theme to default
- Click the menu button , click and select .
- If the Enabled theme is an optional or added theme, it will have a option.
- Click Disable. The default System theme will be enabled.
Switch between installed themes
- Click the menu button , click and select .
- Scroll through the list of themes.
- Click Enable to use that theme.
Remove installed themes
To remove an installed theme that you previously added to Firefox:
- Click the menu button , click and select .
- Click the ellipsis (3-dot) icon that displays for the theme that you want to remove and then select Remove.
If you are not able to remove a theme, see Cannot remove an add-on (extension or theme).
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 (extensions or themes).
