I recently switched browsers from Chrome to Firefox (on account of all the evil), and on top of not being able to figure out how to get black background/white text back, I also can't seem to actually view novels correctly on the desktop version of the site.
As shown in the image below, part of the text always gets cut off by the info sidebar. This doesn't happen on Chrome and luckily isn't a problem in the app, either, but I would like to be able to look at novels in Firefox occasionally.

Anyone else have this issue or know how to fix it?