how to adjust brightness on mac mini, firefox, os hi sierra 10.13.6
went to preferences, display, and no brightness slider is shown
went to preferences, display, and no brightness slider is shown
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The screen brightness is a Mac setting, not something that will appear in the Firefox settings page. The following websites may be helpful for you:
- Change your display’s brightness - Apple Support
- How to Adjust Your Mac’s Screen Brightness, Manually and Automatically - How-To Geek
Hope this helps.