History navigations to twitter.com lead to a 403 HTTP error when PSON is enabled.
<rdar://problem/47417981>
Created attachment 360588 [details] Patch
Comment on attachment 360588 [details] Patch r=me
Comment on attachment 360588 [details] Patch Clearing flags on attachment: 360588 Committed r240750: <https://trac.webkit.org/changeset/240750>
All reviewed patches have been landed. Closing bug.