Bug 309907

Summary:	[Site Isolation] Enable subframe loading for UI-process-driven back/forward navigation when site isolation is enabled.
Product:	WebKit	Reporter:	Basuke Suzuki <basuke>
Component:	New Bugs	Assignee:	Basuke Suzuki <basuke>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Basuke Suzuki

Reported 2026-03-13 11:34:09 PDT

When `UseUIProcessForBackForwardItemLoading` is enabled with site isolation, several issues arise with subframe back/forward navigation. This patch addresses them:

Attachments
Add attachment proposed patch, testcase, etc.

Basuke Suzuki

Comment 1 2026-03-13 11:49:31 PDT

rdar://172495046

Basuke Suzuki

Comment 2 2026-03-13 13:42:49 PDT

Pull request: https://github.com/WebKit/WebKit/pull/60583

Basuke Suzuki

Comment 3 2026-03-13 17:26:13 PDT

*** Bug 308564 has been marked as a duplicate of this bug. ***

EWS

Comment 4 2026-03-18 20:33:18 PDT

Committed 309525@main (f57d285d1e5a): <https://commits.webkit.org/309525@main> Reviewed commits have been landed. Closing PR #60583 and removing active labels.

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