https://bugzilla.mozilla.org/show_bug.cgi?id=1364629
1364629 - Some SVG reftests fail with WebRender/BlobImage
RESOLVED (demo99) in Core - Graphics: WebRender. Last updated 2017-11-07.
svgfail
https://web-platform-tests.org/writing-tests/reftests.html
Reftests — web-platform-tests documentation
web platform testsdocumentation