Rated 5 out of 5 stars

by Jared W on Aug. 24, 2015 · permalink

Starting with Firefox 40, Windows will need HiDPI icons with the themes or they look blurry on HiDPI displays. You can go to about:config and set `layout.css.devPixelsPerPx` to `2` to see what it would look like on a HiDPI display.