Bug: Intermittent browser/components/sidebar/tests/browser/browser_a11y_sidebar.js | single tracking bug
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2025-01-08 04:00:52+00:00
Resolved: 2025-02-03 12:07:08+00:00

**Filed by:** abutkovits [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=489139999&repo=mozilla-beta
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/Oq_Mpu3VSNeTdaA8vM1y5A/runs/0/artifacts/public/logs/live_backing.log

---
```
[task 2025-01-08T03:03:24.628Z] 03:03:24     INFO - TEST-PASS | browser/components/sidebar/tests/browser/browser_a11y_sidebar.js | New tab button is focused. - 
[task 2025-01-08T03:03:24.629Z] 03:03:24     INFO - Leaving test bound test_keyboard_navigation_vertical_tabs
[task 2025-01-08T03:03:24.630Z] 03:03:24     INFO - Console message: [JavaScript Warning: "Loading failed for the module with source �chrome://global/content/vendor/lit.all.mjs�." {file: "about:newtab" line: 0}]
[task 2025-01-08T03:03:24.631Z] 03:03:24     INFO - Console message: [JavaScript Warning: "Loading failed for the module with source �chrome://global/content/lit-utils.mjs�." {file: "about:newtab" line: 0}]
[task 2025-01-08T03:03:24.632Z] 03:03:24     INFO - Console message: [JavaScript Warning: "Loading failed for the module with source �chrome://global/content/elements/moz-label.mjs�." {file: "about:newtab" line: 0}]
[task 2025-01-08T03:03:24.632Z] 03:03:24     INFO - Buffered messages finished
[task 2025-01-08T03:03:24.633Z] 03:03:24     INFO - TEST-UNEXPECTED-FAIL | browser/components/sidebar/tests/browser/browser_a11y_sidebar.js | waiting for vsync to be disabled - timed out after 50 tries. - false == true - 
[task 2025-01-08T03:03:24.633Z] 03:03:24     INFO - Stack trace:
[task 2025-01-08T03:03:24.633Z] 03:03:24     INFO - chrome://mochikit/content/browser-test.js:ensureVsyncDisabled:607
[task 2025-01-08T03:03:24.634Z] 03:03:24     INFO - chrome://mochikit/content/browser-test.js:nextTest:782
[task 2025-01-08T03:03:24.634Z] 03:03:24     INFO - chrome://mochikit/content/browser-test.js:testScope/test_finish/<:1813
[task 2025-01-08T03:03:24.634Z] 03:03:24     INFO - chrome://mochikit/content/browser-test.js:run:1733
[task 2025-01-08T03:03:24.635Z] 03:03:24     INFO - Not taking screenshot here: see the one that was previously logged
[task 2025-01-08T03:03:24.635Z] 03:03:24     INFO - TEST-UNEXPECTED-FAIL | browser/components/sidebar/tests/browser/browser_a11y_sidebar.js | vsync remained enabled at the end of the test. Is there an animation still running? Consider talking to the performance team for tips to solve this. - false == true - 
[task 2025-01-08T03:03:24.635Z] 03:03:24     INFO - Stack trace:
[task 2025-01-08T03:03:24.636Z] 03:03:24     INFO - chrome://mochikit/content/browser-test.js:ensureVsyncDisabled:608
[task 2025-01-08T03:03:24.636Z] 03:03:24     INFO - chrome://mochikit/content/browser-test.js:nextTest:782
[task 2025-01-08T03:03:24.636Z] 03:03:24     INFO - chrome://mochikit/content/browser-test.js:testScope/test_finish/<:1813
[task 2025-01-08T03:03:24.636Z] 03:03:24     INFO - chrome://mochikit/content/browser-test.js:run:1733
[task 2025-01-08T03:03:24.637Z] 03:03:24     INFO - GECKO(6664) | MEMORY STAT | vsize 1137MB | vsizeMaxContiguous 1293MB | residentFast 326MB | heapAllocated 127MB
[task 2025-01-08T03:03:24.638Z] 03:03:24     INFO - TEST-OK | browser/components/sidebar/tests/browser/browser_a11y_sidebar.js | took 9371ms
```