• Test #1 is an animated gif, with a gradient on top
• Test #2 is an animated apng, with a gradient on top
• Test #3 is the same animated apng as test #2, but no gradient
• Test #4 is a copy of the apng from #2 animated apng, still no gradient
• Test #5 is a different copy of the apng in #2 animated apng, with a transparent bg on top
• Test #6 is an animated gif, with no additional background elements
• Test #7 is an animated gif, with no additional background elements (also loaded as img in same doc
• Test #8 is an animated gif loaded as an image instead of background-image