vdpau: firefox 40 crashes when resizing youtube html5 player


I also reported this to mozilla bugzilla: https://bugzilla.mozilla.org/show_bug.cgi?id=1192900
In brief, firefox crashes every time when using libva-vdpau-driver and trying to resize the html5 player. This video works:
nvidia-bug-report.log.gz (127 KB)
firefox-youtube.log (4 KB)
firefox-youtube-bt.log (6.86 KB)

I just installed Fedora 22 and I have this problem too.