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

Is there anything else besides potential mimesniff extensions where TAG review is relevant?

Note that the signatures of JPEG 2000 and AVIF are not mentioned in the mimesniff spec, but browsers supporting these formats (Safari, Chrome, Firefox if the avif flag is enabled) do appear to sniff these signatures. This implies that currently I am not aware of any major browser that actually strictly applies the mimesniff spec at this point, which might indicate that an update of that spec might be appropriate regardless of image/jxl.

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