our Server serves different Image File Formats based on Users User-Agent. (jpg for Firefox, WebP for Chrome)
We send “Vary: User-Agent,Accept-Encoding” Header on all those Files.
But it seems that Cloudflare is ignoring this Header and is only caching one Variant (jpg or webp - whatever is served first)
So when first Access is done with Chrome - the WEBP Image Format is cached - and all Images are broken for Firefox Users which can’t decode WebP …
How to configure Cloudflare that it’s respecting the Vary Header correct?
Thank you, bye from sunny Austria