Comment # 9 on bug 1022830 from Felix Miata

Created attachment 718250 [details]
132 DPI screenshot openSUSE 42.2/Plasma 5 with Firefox ESR45 and 52 windows

(In reply to Wolfgang Rosenauer from comment #8)
> Please note that this does affect Leap 42.2 right now.

http://fm.no-ip.com/Auth/dpi-screen-window.html is URI used in screenshot's
browser windows.

This screenshot shows that 42.2 can be heavily affected by not having Xft.dpi
explicitly set to match Xorg's display density. At upper right, Firefox ESR45
built with GTK2 is using the same size 10 UI fonts as apps not built with GTK3.
Below ESR45 are 52.0.1 and SeaMonkey 2.52a1 built with GTK3, which are using
42.2-standard GTK 3.20.10-3.1, and displaying vastly undersized UI fonts. The
latter appear to be size 7.27pt, or the UI specified size 10pt times 96 divided
by 132, the result of GTK 3 needlessly forcing Xft.dpi to 96 in a 132 DPI
environment where xrdb's Xft.dpi is null.