Anyone else use Palemoon?
https://runbox.com/app/ loads in Ubuntu 16.04 Palemoon 28.1.0 but the CSS is stuffed. It doesn’t display properly at all.
The same issue can be seen on Android Firefox.
In contrast, Ubuntu 16.04 Firefox 57.0.3 displays the page okay.
Well, the web font responsible for displaying the icons is not applied.
I’d recommend checking about:config for gfx.downloadable_fonts.enabled = true and other font-blocking settings.
Setting gfx.downloadable_fonts.enabled to false shows the same behavior as in your screenshot.
Also, you can use the ‘Font’ tab in the network monitor (Menu > Web Developer > Network) to see if the ‘MaterialIcons’ font is loaded.
That change fixed it.
gfx.downloadable_fonts = True restores the menu.