This is what people quite consistently mess up these days. Go back to the earlier days of æsthetic dark themes¹, which was largely in things with the chrome/content split such as Photoshop, and you see this clearly. The purpose of their æsthetic dark modes with their low contrast and neutral middling-dark colours was to draw attention to the content and minimise chrome distraction.
Of browsers: Firefox defaults to having content matching the browser theme, but does let you change it: Settings → General → Language and Appearance → Web site appearance: Automatic/Light/Dark. (In the distant past, this defaulted to matching the OS theme—which almost always meant “light” on Linux and Windows—and could only be changed via about:config. In Firefox 95, the default was changed to matching the browser theme, in https://bugzilla.mozilla.org/show_bug.cgi?id=1529323. In Firefox 100, the preference was finally added to Settings.)
—⁂—
¹ There are several distinct categories of dark modes, with significantly different characteristics. I recognise four general categories (though there are certainly intermediate states too): æsthetic, accessibility, low-light, and power-saving. I wrote a bit more about each in https://news.ycombinator.com/item?id=28516862. These days, æsthetic is the most common.
Of browsers: Firefox defaults to having content matching the browser theme, but does let you change it: Settings → General → Language and Appearance → Web site appearance: Automatic/Light/Dark. (In the distant past, this defaulted to matching the OS theme—which almost always meant “light” on Linux and Windows—and could only be changed via about:config. In Firefox 95, the default was changed to matching the browser theme, in https://bugzilla.mozilla.org/show_bug.cgi?id=1529323. In Firefox 100, the preference was finally added to Settings.)
—⁂—
¹ There are several distinct categories of dark modes, with significantly different characteristics. I recognise four general categories (though there are certainly intermediate states too): æsthetic, accessibility, low-light, and power-saving. I wrote a bit more about each in https://news.ycombinator.com/item?id=28516862. These days, æsthetic is the most common.