2081232 - Frequent macOS /fullscreen/api/document-fullscreen-keyboard-lock-escape.window.html | Tapping Escape without event.preventDefault() should not cause fullscreen exit - assert_equals: fullscreen should stay expected Element node <body><div id="log"></

Status: NEW

(Core :: DOM: Core & HTML, defect)

Description

[Treeherder Bug Filer]

Filed by: sstanca [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer?job_id=599365629&repo=mozilla-central&task=UCrZYSRnTwWunulY07dPdQ.0
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/UCrZYSRnTwWunulY07dPdQ/runs/0/artifacts/public/logs/live_backing.log

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[task 2026-10-13T07:19:22.944+00:00] 07:19:22     INFO - TEST-PASS | /fullscreen/api/document-fullscreen-keyboard-lock-escape.window.html | Holding Escape without event.preventDefault() should cause fullscreen exit
[task 2026-10-13T07:19:22.944+00:00] 07:19:22     INFO - TEST-UNEXPECTED-FAIL | /fullscreen/api/document-fullscreen-keyboard-lock-escape.window.html | Tapping Escape without event.preventDefault() should not cause fullscreen exit - assert_equals: fullscreen should stay expected Element node <body><div id="log"></div>
[task 2026-10-13T07:19:22.944+00:00] 07:19:22     INFO - <script src="/fullscreen/api/d... but got null
[task 2026-10-13T07:19:22.944+00:00] 07:19:22     INFO - @http://web-platform.test:8000/fullscreen/api/document-fullscreen-keyboard-lock-escape.window.js:59:18
[task 2026-10-13T07:19:22.944+00:00] 07:19:22     INFO - TEST-OK | /fullscreen/api/document-fullscreen-keyboard-lock-escape.window.html | took 15201ms
[task 2026-10-13T07:19:22.944+00:00] 07:19:22     INFO - PID 5505 | 1791875962944	Marionette	INFO	Stopped listening on port 53769

Comment 1

[Serban Stanca [:SerbanS]]

There are also some variations of failures: this one and this one. I can't find anything relevant related to it. After some backfills and retriggers, it seems it's failing even before, where it was green.

Hi Keith! Could you please redirect this to someone?

Thank you!