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conformance · v135

v135 · origin-keyed-process-isolation — conformance probe

5 assertions drawn from the spec. Each is a single contract the spec text makes. Pass/fail reflects what this browser executed; blocked means the contract was not run because it needs user mediation, hardware, or another unavailable precondition. Open the page in Chrome stable / canary / Firefox / Safari to compare.

browser: spec: https://html.spec.whatwg.org/multipage/origin.html#origin-keyed-agent-clusters chromestatus: #5182464632946688 generated 2026-06-01T09:43:00Z by conformance-author-v1-subagent
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id contract kind verdict detail
origin-isolation-restricted-readable Document.prototype exposes a documentURI or location.origin readable from script — the baseline for isolation checks. spec ↗ script
origin-agent-cluster-window-property window.originAgentCluster reports whether the document is in an origin-keyed agent cluster. spec ↗ script
origin-agent-cluster-is-boolean window.originAgentCluster returns a boolean. spec ↗ script
origin-isolation-blocks-document-domain When in an origin-keyed agent cluster, attempting to set document.domain throws or is a no-op. spec ↗ script
shared-array-buffer-conditioned-on-isolation SharedArrayBuffer is exposed (proxy of agent-cluster isolation that often coincides with origin-keyed isolation). spec ↗ script