Comment # 13 on bug 1124508 from Felix Miata

Created attachment 796191 [details]
screenshot showing impact of px sized fonts not scaling according to display
density

The TW 20190205 installation screenshot image of "Installation Settings"
displayed in the two Firefox viewports was made using a 2560x1440 resolution
27" screen. In this screenshot, the larger of the two installation images
measures 23" diagonally on my 24" 1920x1200 screen, nicely emulating what the
installation screen would look like on a 23" display. The smaller measures
15.4", nicely emulating what the installation screen would look like on a 15.4"
laptop. My point is to show the increasingly painful result of designs for
display screens using px units to declare sizes - they do not scale according
to display density. Other sizing options, such as keywords like small and
large, and ems and percentages, all scale - automatically. The computer figures
out how many pixels are needed to produce appropriate size instead of the
designer choosing arbitrary px numbers that work for him on his display but
become illegible on high density displays.