**Dark themes have become the latest trend in many programs, apps, and operating systems. It is also possible to enable a dark theme in the Firefox browser. In the following, we will show you how to do this in the Firefox settings and how to enhance the effect with add-ons.**
## How to Activate the Dark Theme in Firefox
Follow our step-by-step instructions or check out the quick guide.
## Dimming All Websites with an Add-on
Follow our step-by-step instructions or check out the quick guide.
## Video
[Include a relevant video explaining the process]
## Quick Guide: How to Activate the Dark Theme in Firefox
[Provide a concise guide outlining the steps]
## Quick Guide: How to Dim All Websites with an Add-on
[Provide a concise guide outlining the steps]
