2012330 - Intermittent browser/components/preferences/tests/browser_security-2.js | single tracking bug

Status: NEW

(Firefox :: Settings UI, defect, P5)

Description

[Treeherder Bug Filer]

Filed by: agoloman [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer?job_id=545323505&repo=mozilla-central&task=fkoRcDfDRuyaokkhcn18Yw.0
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/fkoRcDfDRuyaokkhcn18Yw/runs/0/artifacts/public/logs/live_backing.log

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[task 2026-01-25T11:48:58.681+00:00] 11:48:58     INFO - TEST-PASS | browser/components/preferences/tests/browser_security-2.js | block uncommon checkbox is set correctly
[task 2026-01-25T11:48:58.682+00:00] 11:48:58     INFO - Buffered messages finished
[task 2026-01-25T11:48:58.684+00:00] 11:48:58     INFO - TEST-UNEXPECTED-FAIL | browser/components/preferences/tests/browser_security-2.js | uncaught exception - NS_ERROR_ILLEGAL_VALUE: Component returned failure code: 0x80070057 (NS_ERROR_ILLEGAL_VALUE) [nsIObserverService.removeObserver] at _removeObservers@chrome://browser/content/preferences/experimental.js:189:18
[task 2026-01-25T11:48:58.684+00:00] 11:48:58     INFO - init/<@chrome://browser/content/preferences/experimental.js:40:50
[task 2026-01-25T11:48:58.684+00:00] 11:48:58     INFO - EventListener.handleEvent*init@chrome://browser/content/preferences/experimental.js:40:12
[task 2026-01-25T11:48:58.684+00:00] 11:48:58     INFO - init@chrome://browser/content/preferences/preferences.js:341:22
[task 2026-01-25T11:48:58.684+00:00] 11:48:58     INFO - initializeCategories@chrome://browser/content/preferences/findInPage.js:130:18
[task 2026-01-25T11:48:58.684+00:00] 11:48:58     INFO - init/</<@chrome://browser/content/preferences/findInPage.js:78:47
[task 2026-01-25T11:48:58.684+00:00] 11:48:58     INFO - requestIdleCallback handler*init/<@chrome://browser/content/preferences/findInPage.js:78:16
[task 2026-01-25T11:48:58.684+00:00] 11:48:58     INFO - EventListener.handleEvent*init@chrome://browser/content/preferences/findInPage.js:73:14
[task 2026-01-25T11:48:58.684+00:00] 11:48:58     INFO - init_all@chrome://browser/content/preferences/preferences.js:398:22
[task 2026-01-25T11:48:58.684+00:00] 11:48:58     INFO - 
[task 2026-01-25T11:48:58.684+00:00] 11:48:58     INFO - chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:simpletestOnerror:2071
[task 2026-01-25T11:48:58.684+00:00] 11:48:58     INFO - OnErrorEventHandlerNonNull*chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:null:2046
[task 2026-01-25T11:48:58.684+00:00] 11:48:58     INFO - chrome://mochikit/content/browser-test.js:Tester:185
[task 2026-01-25T11:48:58.684+00:00] 11:48:58     INFO - chrome://mochikit/content/browser-harness.xhtml:createTester/</<:261
[task 2026-01-25T11:48:58.685+00:00] 11:48:58     INFO - GECKO(23921) | JavaScript error: chrome://browser/content/preferences/experimental.js, line 189: NS_ERROR_ILLEGAL_VALUE: Component returned failure code: 0x80070057 (NS_ERROR_ILLEGAL_VALUE) [nsIObserverService.removeObserver]
[task 2026-01-25T11:48:58.686+00:00] 11:48:58     INFO - Console message: [JavaScript Error: "NS_ERROR_ILLEGAL_VALUE: Component returned failure code: 0x80070057 (NS_ERROR_ILLEGAL_VALUE) [nsIObserverService.removeObserver]" {file: "chrome://browser/content/preferences/experimental.js" line: 189}]
[task 2026-01-25T11:48:58.686+00:00] 11:48:58     INFO - _removeObservers@chrome://browser/content/preferences/experimental.js:189:18
[task 2026-01-25T11:48:58.686+00:00] 11:48:58     INFO - init/<@chrome://browser/content/preferences/experimental.js:40:50
[task 2026-01-25T11:48:58.686+00:00] 11:48:58     INFO - EventListener.handleEvent*init@chrome://browser/content/preferences/experimental.js:40:12
[task 2026-01-25T11:48:58.686+00:00] 11:48:58     INFO - init@chrome://browser/content/preferences/preferences.js:341:22
[task 2026-01-25T11:48:58.686+00:00] 11:48:58     INFO - initializeCategories@chrome://browser/content/preferences/findInPage.js:130:18
[task 2026-01-25T11:48:58.686+00:00] 11:48:58     INFO - init/</<@chrome://browser/content/preferences/findInPage.js:78:47
[task 2026-01-25T11:48:58.686+00:00] 11:48:58     INFO - requestIdleCallback handler*init/<@chrome://browser/content/preferences/findInPage.js:78:16
[task 2026-01-25T11:48:58.686+00:00] 11:48:58     INFO - EventListener.handleEvent*init@chrome://browser/content/preferences/findInPage.js:73:14
[task 2026-01-25T11:48:58.686+00:00] 11:48:58     INFO - init_all@chrome://browser/content/preferences/preferences.js:398:22
[task 2026-01-25T11:48:58.686+00:00] 11:48:58     INFO - 
[task 2026-01-25T11:48:58.816+00:00] 11:48:58     INFO - TEST-PASS | browser/components/preferences/tests/browser_security-2.js | downloads preference is initialized correctly