Is it possible to turn on dark mode in devtools without completely disabling RFP?
I sometimes need to test if a website I develop is working correctly in dark mode, but dark/light mode buttons doesn't work in LibreWolf devtools. Is there a solution for this?
Librewolf turns on resist fingerprinting by default. If you go into about:config and disable resist fingerprinting, you can re enable light/dark mode preferences being recognized by the browser.
Or you could install the Dark Reader extension, but that will overwrite all CSS and approximate Dark Mode rather than use a customized CSS stylesheet.
Or you could install Vanilla Firefox and use that only to develop while you use Librewolf to privately browse, which is what I do.
You can create a new profile on the about:profiles page, which you could use for development. This is like if you installed a new browser, but with your original one, because the new profile have it's own separate settings.