Re: [w3ctag/design-reviews] JPEG XL decoding (#633)

Note that afaik, in the case of JPEG 2000, AVIF, and JPEG XL, current behavior of supporting browsers is to do mime sniffing for those signatures too (so not following the current mimesniff spec but de facto extending it).

Would there be any security-related or other advantages if this would be changed?

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