Stop treating "text/xsl" as a XML MIME type, as per: - https://mimesniff.spec.whatwg.org/#xml-mime-type Neither Blink or Gecko treat it as a valid XML MIME type.
Pull request: https://github.com/WebKit/WebKit/pull/14371
Committed 264585@main (7c5509f22cb9): <https://commits.webkit.org/264585@main> Reviewed commits have been landed. Closing PR #14371 and removing active labels.
<rdar://problem/109891144>