Upstream bug is still open but reporter said issue was fixed in Firefox 57.0.4 over a year ago. Test file works here with Firefox 66.0.2 in Ubuntu 18.04 so closing as fixed.
Upstream bug is still open but reporter said issue was fixed in Firefox 57.0.4 over a year ago. Test file works here with Firefox 66.0.2 in Ubuntu 18.04 so closing as fixed.