Cache navigator.userAgent for performance. We currently ask the client 5 times while loading apple.com.
Created attachment 341207 [details] Patch
Comment on attachment 341207 [details] Patch r=me
Comment on attachment 341207 [details] Patch Clearing flags on attachment: 341207 Committed r232159: <https://trac.webkit.org/changeset/232159>
All reviewed patches have been landed. Closing bug.
<rdar://problem/40530246>