We should maintain the original Content-Type header on 303 HTTP redirect, like we do for the 307 and 308 ones. This would align our behavior with Blink and Gecko.
Pull request: https://github.com/WebKit/WebKit/pull/2602
Committed 252713@main (afacf71feeaa): <https://commits.webkit.org/252713@main> Reviewed commits have been landed. Closing PR #2602 and removing active labels.
<rdar://problem/97402994>