How to Enable New Compact Themes in Firefox

For many years now, Mozilla Firefox has supported themes that allow you to change the look and feel of the browser. These themes are skins that can help you personalize the Firefox appearance. Until the version 52 of Firefox, it came with a default theme and you could download more of these themes from the Mozilla Themes website. But with the new version of Firefox (version 53), you have two extra themes added to the Firefox installation package. These two themes are called Compact Dark and Compact Light.

Here is how you can enable these new themes in Firefox:

Note: These steps apply only to Firefox version 53.0 (and perhaps future versions). If you have not yet updated to the new version of Firefox, then you can download the new version by visiting

  1. Launch Firefox web browser and enter about:addons in the address bar.
  2. Select the Appearance section from the left side.
  3. You will see three themes in the list of installed themes – Default, Compact Dark and Compact Light. You can click on the Enable button against any of these themes to enable and apply them.Enable Compact Themes in Firefox

You won’t see much difference anywhere else in the Firefox browser except the address bar and toolbar region. If you enable the Compact Dark theme, Firefox toolbar gets the dark appearance. Similarly, if you enable the Compact Light theme, Firefox toolbar gets the light appearance. Everywhere else, Firefox continues to look exactly the same.

Enable Compact Themes in Firefox

And of course, if you want to revert back to the default theme then you can use the exact the same steps – only this time, you have to click on the Enable button against the default theme in the list of the installed themes. Not to mention that you can install even more themes by visiting the website that has hundreds of users created themes for download.