We should mask extension URLs in the WebKit implementation.
<rdar://problem/121202843>
*** Bug 270460 has been marked as a duplicate of this bug. ***
Pull request: https://github.com/WebKit/WebKit/pull/27168
Committed 277409@main (302615241a68): <https://commits.webkit.org/277409@main> Reviewed commits have been landed. Closing PR #27168 and removing active labels.