Re:You Don't Know GIF – An analysis of a GIF file and some w...
by OscarCunningham on Saturday March 19, 2022 @03:31AM
(#30731916)
It's now 8 days later, and it's fixed in the nightly build. Although in contrast to what it says in the blog post, it's a perfectly white square.
Mozregression looks amazing: https://mozilla.github.io/mozregression/