I would like me a pitch black option as well. Saves battery on OLED screens and the greys of the new dark theme annoy my autist brain just that tiny bit.
yeah you can tell me to eat a dick or whatever but I am -not- doing this webp shit. Most of my uploaded images are MEANT to be DELICIOUS, CRISP-looking PORTABLE NETWORK GRAPHICS pictures that oft don't exceed a few hundred kilobytes in size; neither is getting hit with the "allow HTML5 canvas data extraction or no images" particularly nice.
A better indication of page number in dark mode would be nice, you can't tell what page you're on.
Also, having the options in account settings for more messages per page would be nice if possible and if it didn't put too much load on the server. I hate clicking forward a million times on things like US Politics a hundred times.