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  <p dir="auto">Having now setup a test and tried this locally I think we may all have been misunderstanding the exact problem here, mainly due to the somewhat confusing error from the browser.</p>
<p dir="auto">What confused me was the "redirect is not allowed for a preflight request" which makes it sounds like the preflight got redirected but in Firefox the complaint is simply that it got redirected to the active storage endpoint and CORS didn't allow access to that which is in fact the real problem - that GPX downloads get redirected to active storage but we don't currently allow cross origin access to that.</p><p style="font-size:small;-webkit-text-size-adjust:none;color:#666;">—<br />Reply to this email directly, <a href="https://github.com/openstreetmap/openstreetmap-website/issues/5639#issuecomment-2677082427">view it on GitHub</a>, or <a href="https://github.com/notifications/unsubscribe-auth/AAK2OLI245KADOHMTWLYO3L2RIRETAVCNFSM6AAAAABWZEQ5NSVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDMNZXGA4DENBSG4">unsubscribe</a>.<br />You are receiving this because you are subscribed to this thread.<img src="https://github.com/notifications/beacon/AAK2OLKLDVBWLLW6KGGX7LL2RIRETA5CNFSM6AAAAABWZEQ5NSWGG33NNVSW45C7OR4XAZNMJFZXG5LFINXW23LFNZ2KUY3PNVWWK3TUL5UWJTU7SEETW.gif" height="1" width="1" alt="" /><span style="color: transparent; font-size: 0; display: none; visibility: hidden; overflow: hidden; opacity: 0; width: 0; height: 0; max-width: 0; max-height: 0; mso-hide: all">Message ID: <span><openstreetmap/openstreetmap-website/issues/5639/2677082427</span><span>@</span><span>github</span><span>.</span><span>com></span></span></p>
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<div style="display: flex; flex-wrap: wrap; white-space: pre-wrap; align-items: center; "><img alt="tomhughes" height="20" width="20" style="border-radius:50%; margin-right: 4px;" decoding="async" src="https://avatars.githubusercontent.com/u/147741?s=20&v=4" /><strong>tomhughes</strong> left a comment <a href="https://github.com/openstreetmap/openstreetmap-website/issues/5639#issuecomment-2677082427">(openstreetmap/openstreetmap-website#5639)</a></div>
<p dir="auto">Having now setup a test and tried this locally I think we may all have been misunderstanding the exact problem here, mainly due to the somewhat confusing error from the browser.</p>
<p dir="auto">What confused me was the "redirect is not allowed for a preflight request" which makes it sounds like the preflight got redirected but in Firefox the complaint is simply that it got redirected to the active storage endpoint and CORS didn't allow access to that which is in fact the real problem - that GPX downloads get redirected to active storage but we don't currently allow cross origin access to that.</p>

<p style="font-size:small;-webkit-text-size-adjust:none;color:#666;">—<br />Reply to this email directly, <a href="https://github.com/openstreetmap/openstreetmap-website/issues/5639#issuecomment-2677082427">view it on GitHub</a>, or <a href="https://github.com/notifications/unsubscribe-auth/AAK2OLI245KADOHMTWLYO3L2RIRETAVCNFSM6AAAAABWZEQ5NSVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDMNZXGA4DENBSG4">unsubscribe</a>.<br />You are receiving this because you are subscribed to this thread.<img src="https://github.com/notifications/beacon/AAK2OLKLDVBWLLW6KGGX7LL2RIRETA5CNFSM6AAAAABWZEQ5NSWGG33NNVSW45C7OR4XAZNMJFZXG5LFINXW23LFNZ2KUY3PNVWWK3TUL5UWJTU7SEETW.gif" height="1" width="1" alt="" /><span style="color: transparent; font-size: 0; display: none; visibility: hidden; overflow: hidden; opacity: 0; width: 0; height: 0; max-width: 0; max-height: 0; mso-hide: all">Message ID: <span><openstreetmap/openstreetmap-website/issues/5639/2677082427</span><span>@</span><span>github</span><span>.</span><span>com></span></span></p>

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