Firefox is my browser of choice on desktop and the new mobile version is brilliant but I badly need an extension that will reverse light background websites to be dark. This is the only thing blocking me adopting it as mobile browser of choice.
Is there an extension for desktop that does it? Install it on the mobile version. New (chrome) style extension just work, from what I know (there are a few APIs that don't, but those that use them are likely the extensions that don't make sense on mobile). An extension I made for work just worked without problem.
Edit: Sorry, I was referring to Firefox mobile, and this is regarding Firefox preview, which I don't have any actual experience with. I'm not sure how much applies.
"With Dark Reader, websites on mobile will be easy to read when the lights are dim. The extension automatically inverts bright colors on web pages to offer an eye-pleasing dark mode. There are a number of configuration options allowing you to customize your experience."
I'm just using "invert colors" from the Android toggles panel. No need for an extension (DarkReader is heavy), nothing to install and works everywhere.
