The base waterfox themes actually break websites' CSS. For example, if you use Light Mode everywhere, it'll create white boxes around text that's not supposed to be there. With dark mode, it'll be things like dropdowns being dark text on dark backgrounds.

This theme, for dark mode, actually fixes a lot of the issues with the original themes. Works with Waterfox v6.6.7 (Dec 2025) despite being 9 years old!

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I agree with P.B., this theme made perfect decisions on darkness and contrast control. Comfortable and stable. The original theme (by elibroftw) choosed black in tab background, but I like this theme's color selection, dark gray. I'm using (vanilla) Firefox with compact mode, and this fits perfectly.

I don't use Waterfox but this extension has the perfect darkness for my mac, it's not too dark for the text to be too hard to see and it's not light grey, it is perfect! I love it with Firefox Nightly.