Twitter (x.com) has a black background in Safari
On Firefox and Chrome, Twitter has a white background. Other sites on Safari do not have a black background. I have tried fiddling with settings on both Twitter and Safari, and I don't see a way to change this background, which makes it difficult to read the page and makes the scrollbar nearly invisible. I moved Twitter to Safari because it currently does not load in Firefox. This looks like a theme, but I see no place to select a theme in Safari. I am running macOS Sonoma 14.5 and Safari Version 17.5 (19618.2.12.11.6).
MacBook Pro 15″, macOS 11.5