Bug: Intermittent browser/components/messagepreview/tests/browser/browser_messagepreview_show_privatebrowsing.js | single tracking bug
Status: NEW
Priority: P1
Created: 2025-02-07 04:54:55+00:00
Resolved: 2025-03-03 06:34:38+00:00

**Filed by:** sstanca [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=493760606&repo=mozilla-central
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/T-pKm9BaRK-xzxfdsFTjLg/runs/0/artifacts/public/logs/live_backing.log

---
```
[task 2025-02-07T04:27:40.243Z] 04:27:40     INFO - TEST-PASS | browser/components/messagepreview/tests/browser/browser_messagepreview_show_privatebrowsing.js | Private window opened - [object Window] == true - 
[task 2025-02-07T04:27:40.243Z] 04:27:40     INFO - Buffered messages logged at 04:27:32
[task 2025-02-07T04:27:40.244Z] 04:27:40     INFO - Console message: [JavaScript Warning: "[fluent] Missing message in locale en-US: newtab-search-box-input" {file: "about:privatebrowsing" line: 0}]
[task 2025-02-07T04:27:40.244Z] 04:27:40     INFO - Console message: [JavaScript Warning: "[fluent] Missing message in locale en-US: newtab-search-box-text" {file: "about:privatebrowsing" line: 0}]
[task 2025-02-07T04:27:40.245Z] 04:27:40     INFO - Console message: [JavaScript Warning: "[fluent] Couldn't find a message: newtab-search-box-input" {file: "about:privatebrowsing" line: 0}]
[task 2025-02-07T04:27:40.245Z] 04:27:40     INFO - Console message: [JavaScript Warning: "[fluent] Couldn't find a message: newtab-search-box-text" {file: "about:privatebrowsing" line: 0}]
[task 2025-02-07T04:27:40.246Z] 04:27:40     INFO - Console message: [JavaScript Warning: "[dom/l10n] Errors during l10n mutation frame." {file: "about:privatebrowsing" line: 0}]
[task 2025-02-07T04:27:40.246Z] 04:27:40     INFO - Buffered messages finished
[task 2025-02-07T04:27:40.247Z] 04:27:40     INFO - TEST-UNEXPECTED-FAIL | browser/components/messagepreview/tests/browser/browser_messagepreview_show_privatebrowsing.js | Uncaught exception in test bound test_show_private_browsing_message - undefined - timed out after 50 tries.
[task 2025-02-07T04:27:40.247Z] 04:27:40     INFO - Leaving test bound test_show_private_browsing_message
[task 2025-02-07T04:27:40.248Z] 04:27:40     INFO - GECKO(1318) | MEMORY STAT | vsize 16574MB | residentFast 541MB | heapAllocated 172MB
[task 2025-02-07T04:27:40.248Z] 04:27:40     INFO - TEST-OK | browser/components/messagepreview/tests/browser/browser_messagepreview_show_privatebrowsing.js | took 10381ms
[task 2025-02-07T04:27:40.248Z] 04:27:40     INFO - Not taking screenshot here: see the one that was previously logged
[task 2025-02-07T04:27:40.249Z] 04:27:40     INFO - TEST-UNEXPECTED-FAIL | browser/components/messagepreview/tests/browser/browser_messagepreview_show_privatebrowsing.js | Found an unexpected tab at the end of test run: about:messagepreview - 
[task 2025-02-07T04:27:40.249Z] 04:27:40     INFO - GECKO(1318) | [Child 1321: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 112d20800 == 2 [pid = 1321] [id = 8]
[task 2025-02-07T04:27:40.250Z] 04:27:40     INFO - GECKO(1318) | [Child 1321: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 8 (10f324e00) [pid = 1321] [serial = 23] [outer = 0]
[task 2025-02-07T04:27:40.250Z] 04:27:40     INFO - GECKO(1318) | [Child 1321: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 9 (112d21000) [pid = 1321] [serial = 24] [outer = 10f324e00]
[task 2025-02-07T04:27:40.257Z] 04:27:40     INFO - checking window state
[task 2025-02-07T04:27:40.258Z] 04:27:40     INFO - Not taking screenshot here: see the one that was previously logged
[task 2025-02-07T04:27:40.258Z] 04:27:40     INFO - TEST-UNEXPECTED-FAIL | browser/components/messagepreview/tests/browser/browser_messagepreview_show_privatebrowsing.js | Found an unexpected browser window at the end of test run - 
[task 2025-02-07T04:27:40.258Z] 04:27:40     INFO - GECKO(1318) | must wait for focus
[task 2025-02-07T04:27:40.493Z] 04:27:40     INFO - TEST-START | browser/components/messagepreview/tests/browser/browser_messagepreview_show_spotlight.js
```