Use themes to change the look of Firefox

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. Firefox comes with a Default theme and optional Light and Dark themes but you can always install new themes.

fx57 theme - Mac1 fx57_theme_Mac2

Note: All themes are lightweight (background) themes. Complete themes are no longer supported. See Built-in themes in Firefox - alternative to complete themes.

Installing themes

  1. Click the menu button Fx57menu , click Fx57Addons-icon Add-ons and select Get Add-onsRecommendations or Themes.
  2. Scroll through the suggested themes or visit addons.mozilla.org to browse more themes.
  3. Click on the theme's author to see more information about it.
  4. Click the + Install Theme button.
    theme card add-ons manager
    • To install a theme from addons.mozilla.org, click on the theme and select the + Install Theme button on the resulting page.
    themes fx57 2
    Firefox will download the requested theme and may notify you that it has been installed.

Managing themes

Switch themes

  1. Click the menu button Fx57menu , click Fx57Addons-icon Add-ons and select Themes.
  2. Scroll through the list of themes.
  3. Click the ellipsis (3-dot) icon that displays for the desired theme and then select Enable.
    fx72 enable themes enable add-on

Remove themes

You cannot remove the Default, Light or Dark themes that come with Firefox but you can remove added themes. To remove an installed theme you've added to Firefox:

  1. Click the menu button Fx57menu , click Fx57Addons-icon Add-ons and select Themes.
  2. Click the ellipsis (3-dot) icon that displays for the theme that you want to remove and then select Remove.
    fx72 remove themes remove theme
Note:If you remove the Enabled theme, the Default theme will become enabled.

If you are not able to remove a theme, see Cannot remove an add-on (extension or theme).

Troubleshooting

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