NEW310164
[Site Isolation] Web Inspector: deterministic Network IDs, event routing, and frontend fixes for cross-origin iframes 
https://bugs.webkit.org/show_bug.cgi?id=310164
Summary [Site Isolation] Web Inspector: deterministic Network IDs, event routing, and...
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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