Bug 310164

Summary:	[Site Isolation] Web Inspector: deterministic Network IDs, event routing, and frontend fixes for cross-origin iframes
Product:	WebKit	Reporter:	Blaze Burg <bburg>
Component:	Web Inspector	Assignee:	Blaze Burg <bburg>
Status:	NEW
Severity:	Normal	CC:	inspector-bugzilla-changes, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified
See Also:	https://github.com/WebKit/WebKit/pull/60842
Bug Depends on:	310163
Bug Blocks:

Blaze Burg

Reported 2026-03-17 23:07:05 PDT

Add BackendIdentifierRegistry with deterministic type-prefixed protocol IDs (frame-PID.OID, request-PID.OID) so UIProcess and WebContent processes independently compute matching IDs. Route Network events through the multiplexing target. Emit RemoteFrame stubs in Page.getResourceTree. Fix NetworkManager frame lookup for dynamically-added cross-origin iframes with lazy stub creation. Disable PageNetworkAgent under SI to avoid duplicate events. Part of the Site Isolation Network domain support: rdar://143782685

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Radar WebKit Bug Importer

Comment 1 2026-03-17 23:07:11 PDT

<rdar://problem/172806663>

Blaze Burg

Comment 2 2026-03-17 23:28:25 PDT

Pull request: https://github.com/WebKit/WebKit/pull/60842

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