Pale Moon forum

I've found a little annoying font bug in Pale Moon when visiting http://hogyantortent.com/brezsnyev-fotitkar-a-passziv-dohanyos/
The special hungarian accents (Őő: U+150, U+151, Űű: U+170, U+171) doesn't rendering from the site specific font: While this rendering is corrent with the windows version of Pale Moon: I've tried to change some settings (layout.css.unicode-range.enabled, cleartype/graphite, useragent) with no luck. Then I realized, the main problem is the linux version of Pale Moon hasn't downloaded the latin-ext font ( http://fonts.gstatic.com/s/oswald/v13/yg0glPPxXUISnKUejCX4qfesZW2xOQ-xsNqO47m55DA.woff2 ), so it can't use it at all. This only happens when one font family is splitted into multiple files. Are there any workarounds or is it a bug?