I'm using Ubuntu 17.10 on a Dell XPS 13 with a 3200x1800 screen and while most native applications seem to scale okay using the "Scale" option in my display settings, Firefox seems to render at a lower resolution and "scale up", causing all graphics and especially fonts to be blurry. Is there something I can do to fix this? It's nice that many/most programs behave, but frustrating that the programs I use 95% of the time (FF & Atom) scale so poorly.
Here's an example demonstrating the issue. FF and the settings app: