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Hmm ... https://developers.google.com/speed/pagespeed/insights/?hl=de&url=https://www.avforums.com/threads/lg-oled-b9-55-with-1-bright-pixel.2293697/


This complains about https://www.avforums.com/attachments/brightdot-jpg.1319268/ and https://www.avforums.com/attachments/brightdot-jpg.1319267/ not being in a modern format (eg. WebP)


So either this is not (yet) enabled or it does not work:

XenForo does deliver attachments through PHP to do access permission checks and does set header Cache-control: private, no-cache, max-age=0 so CloudFlare shouldn't be able to cache this response (and transform it do WebP for supporting clients) - if they did, this could bypass permissions?


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