The best black theme for Firefox that protect your eyes late at night. The complete dark theme for Firefox protect your eyes late at night. As well it can help you with eyestrain (a tiredness of the eyes caused by prolonged close work by a person with an uncorrected vision problem), make text easier to read, and they are stylish too. This is a 100% solid black theme background. From the title bar to the frame content inside the Firefox web browser. To learn more go to: https://www.turnoffthelights.com/browser/ Make a small donation to support our Free and Open-Sourcework: https://www.turnoffthelights.com/donate/ Get the Black theme now for in your Firefox web browser! Don't forget to like & Follow Us: Facebook https://www.facebook.com/turnoffthelight Twitter https://twitter.com/TurnOfftheLight Pinterest https://www.pinterest.com/turnoffthelight Instagram https://www.instagram.com/turnoffthelights YouTube https://www.youtube.com/@turnoffthelights <<< Option feature >>> To protect your eyes at night and to get focus on the video player such as YouTube™. It's recommend to use and install the Turn Off the Lights for YouTube and Beyond https://addons.mozilla.org/en-US/firefox/addon/turn-off-the-lights/