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conformance · v133

v133 · remove-chrome-welcome-page-triggering-via-initial-prefs-first-run-tabs — 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://chromestatus.com/feature/5118328941838336 chromestatus: #5118328941838336 generated 2026-06-01T08:12:59Z by conformance-author-v1-subagent
0
pass
0
fail
0
blocked
5
total
id contract kind verdict detail
no-chromewelcomefirstrun-on-window Visiting an arbitrary page does not inject any global named after Chrome's welcome flow (this removal is internal to Chrome's first-run setup; sanity check that nothing leaked to the web). script
navigator-still-exposes-userAgent navigator.userAgent remains exposed; this change does not modify the navigator surface. script
location-href-still-works location.href remains readable; the removal is internal. script
history-pushstate-still-works history.pushState remains exposed (the removal does not affect navigation surfaces). typeof
no-window-firstruntabs No window.firstRunTabs property is exposed (the internal initial-prefs mechanism has no web counterpart). script