Creating scripts in noscript in mullvad?

in the guides here, its mentioned to not download any extensions for mullvad since it will create a new fingerprint. I want to have dark mode, can I code it in noscript and stay safe with mullvad?

Im not sure specifically, but the general gist is to not make any settings changes to Mullvad as it will probably affect your fingerprint. If dark mode is so important, you might be better off just using Firefox