Web pages having black backgrounds
I use Mozilla Firefox on a regular on iMac desktop. However, every web page has a black background. Unable to see whole website and some of the lettering.
iMac 24″, macOS 14.4
Firefox menu﹥Settings﹥General﹥Language and Appearance﹥
﹥Appearance / Extensions / Themes / Colors
Each of those options could influence the background of sites.