Apps are currently checking if request uri is the same as web view main resource uri which might not be accurate.
Pull request: https://github.com/WebKit/WebKit/pull/5809
This is to help fix bug #245625.
Committed 256058@main (e35d40906d10): <https://commits.webkit.org/256058@main> Reviewed commits have been landed. Closing PR #5809 and removing active labels.