Even better, does anyone know if there’s a URL query that would avoid visiting the default light mode version of the forum? For example, I use the following with duckduckgo, which works well to avoid blue light altogether: xhttps://duckduckgo.com/?kae=d
Yes, it works with no issues when you are logged in, but there is no way to switch to dark mode when not logged in.
If you are using disposable qubes for your browser, mullvad/tor browser, librewolf, or any other browser that resets cookies, then you have to log in every time you start the browser to get dark mode, or know the preview parameter option.
The qubes forum was one of the few pages I couldn’t change to dark mode, having a single all white fullscreen page at night, when everything else is in dark mode, can be a little rough on the eyes.