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FF153 Range requests pass through SW in same-origin no-cors requests #44580

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FF153 Range requests pass through SW in same-origin no-cors requests #44580

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FF153 Range requests pass through SW in same-origin no-cors requests
hamishwillee Jun 26, 2026
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hamishwillee Jun 26, 2026
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7 changes: 6 additions & 1 deletion files/en-us/mozilla/firefox/releases/153/index.md
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Expand Up @@ -44,7 +44,12 @@ Firefox 153 is the current [Beta version of Firefox](https://www.firefox.com/en-

<!-- #### Removals -->

<!-- ### HTTP -->
### HTTP

- A same-origin fetch request for a media element (for example, from a {{htmlelement("video")}} element) will now pass through a service worker without stripping the {{httpheader("Range")}} header.
Previously the `Range` header was only preserved in same-origin CORS requests, made by adding the `crossorigin` attribute (`<video crossorigin>`).
Note that fetch requests for genuinely cross-origin media don't yet go through service workers.

@hamishwillee hamishwillee Jun 26, 2026

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@jakearchibald I decided to add a release note following your comment in https://bugzilla.mozilla.org/show_bug.cgi?id=1465074#c34 . This look OK to you?

Note that I took your comment about cross origin media literally (it is possibly you meant cross origin no-cors media goes through the SW but range headers are stripped - but I doubt it)

([Firefox bug 1465074](https://bugzil.la/1465074)).

<!-- #### Removals -->

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