ShadowXVII edited a comment on issue #1685: Pagespeed causes high FTTB on nginx URL: https://github.com/apache/incubator-pagespeed-ngx/issues/1685#issuecomment-613152557 The Cache-Control is currently dictated by the Pagespeed module. The documentation suggests `By default PageSpeed serves HTML files with Cache-Control: no-cache, max-age=0` Which means with `PageSpeed=off` it'll go back to default NGINX, which is the absence of any `Cache-Control` header. I checked this by querying origin directly, no header was returned. When querying the CDN with my requests, Azure Front Door adds headers to indicate Hit/Miss -- I'm getting a `TCP_MISS` for `PageSpeed=on` and `TCP_HIT` for `PageSpeed=off`
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