It would be nice if DarkMode had a toggle to *not* invert anything by default, just provide the switch and the HTML-level class to be able to make ".client-dark-mode" CSS rules. Un-inverting images with another filter does not always bring it back to the correct colors exactly and it's tricky to get the exact background colors you want via CSS since it's all being inverted.
Topic on Extension talk:DarkMode
It appears just doing "filter: unset" on `.client-dark-mode` does just that. Would be lighter to have an extension variable control that though.