gecko-dev/gfx/tests/crashtests/large-scaled-mask.html

<style>
* {
  scale: 48% 41467;
  border: solid !important;
  filter: url(#x);
  -webkit-mask-image: url(data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
}
</style>