help reporting issue with Firefox

[ousia]

This comes from #7533 (which [I think it] contributes to #7532).

Animation sample can be found at https://www.free-culture.tk/ (actually, https://www.free-culture.tk/lfc-presentation.swf).

Recent versions of Firefox experience image issues when:

• Either with selfhosted builds or browser extension.

• When hardware acceleration isn’t available (or simply disabled).

• This is most noticeable on big screens (I’m experiencing it on 27″)

• If the image is displayed right at full screen, it won’t be at normal size (wrong dimensions).

  

• If the image is displayed right at normal size, fullscreen dimensions are wrong.

  

• Fullscreen without hardware acceleration demands too much and there aren’t enough resources available for audio playing.

I know I have to report the issue to Mozilla, but I don’t know where to start.

BTW, Chrome doesn’t have any issue with the same animation and selfhosted build.