User Agent: Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:54.0) Gecko/20100101 Firefox/54.0 Build ID: 20170725113540 Steps to reproduce: Fedora 26 Latest Nightly from Flatpack Default font (DejaVu Serif) Actual results: cf attached screenshot, I can't see the text and videos, but images works Expected results: I should see the text and videos

Please upgrade your graphics driver: https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration

This Fedora install seems to have some serious issues :). Nical, again, ever seen anything like this?

I wouldn't be surprised that the extra sandboxing from flatpak prevents some resources (like fonts) from being loaded. Sébastien, could you try with a regular nightly build from https://www.mozilla.org/en-US/firefox/channel/desktop/ (without flatpak)? If the regular nightly build also has the issue, it would be interesting to see what's reproted by the about:support page.

Sure I will do that

(In reply to Nicolas Silva [:nical] from comment #3) > I wouldn't be surprised that the extra sandboxing from flatpak prevents some > resources (like fonts) from being loaded. Sébastien, could you try with a > regular nightly build from > https://www.mozilla.org/en-US/firefox/channel/desktop/ (without flatpak)? > If the regular nightly build also has the issue, it would be interesting to > see what's reproted by the about:support page. Yeap, it works without flatpak. Perfect :)

Looks like this is already in the radar of the people working on firefox with flatpak: https://github.com/xhorak/firefox-devedition-flatpak/issues/36