Set top origin of CORS preflight requests
Created attachment 458546 [details] Patch
<rdar://problem/92458995>
Comment on attachment 458546 [details] Patch r=me
Committed r293591 (250100@main): <https://commits.webkit.org/250100@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 458546 [details].
Re-opened since this is blocked by bug 239907