Bug: Intermittent browser/components/aboutlogins/tests/browser/browser_tabKeyNav.js | [JavaScript Error: "Error: TelemetryStopwatch: key "FX_SESSION_RESTORE_CONTENT_COLLECT_DATA_MS" was already initialized" {file: "resource:///modules/sessionstore/ContentSessi
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2020-06-17 00:31:03+00:00
Resolved: 2020-07-28 17:05:10+00:00

**Filed by:** nbeleuzu [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer.html#?job_id=306555752&repo=mozilla-central
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/Hwh4N7YWRhWo-bAAzOFDhg/runs/0/artifacts/public/logs/live_backing.log

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[task 2020-06-16T22:43:34.082Z] 22:43:34     INFO - TEST-PASS | browser/components/aboutlogins/tests/browser/browser_tabKeyNav.js | .breach-alert should be hidden if the login is not breached. current login breached? true - false == false - 
[task 2020-06-16T22:43:34.082Z] 22:43:34     INFO - Console message: [JavaScript Error: "Error: TelemetryStopwatch: key "FX_SESSION_RESTORE_CONTENT_COLLECT_DATA_MS" was already initialized" {file: "resource:///modules/sessionstore/ContentSessionStore.jsm" line: 466}]
[task 2020-06-16T22:43:34.082Z] 22:43:34     INFO - send@resource:///modules/sessionstore/ContentSessionStore.jsm:466:28
[task 2020-06-16T22:43:34.082Z] 22:43:34     INFO - sendWhenIdle@resource:///modules/sessionstore/ContentSessionStore.jsm:430:14
[task 2020-06-16T22:43:34.082Z] 22:43:34     INFO - sendWhenIdle/<@resource:///modules/sessionstore/ContentSessionStore.jsm:437:48
[task 2020-06-16T22:43:34.082Z] 22:43:34     INFO - 
[task 2020-06-16T22:43:34.083Z] 22:43:34     INFO - Console message: [JavaScript Error: "Error: TelemetryStopwatch: requesting elapsed time for nonexisting stopwatch. Histogram: "FX_SESSION_RESTORE_CONTENT_COLLECT_DATA_MS", key: "historychange"" {file: "resource:///modules/sessionstore/ContentSessionStore.jsm" line: 472}]
[task 2020-06-16T22:43:34.083Z] 22:43:34     INFO - send@resource:///modules/sessionstore/ContentSessionStore.jsm:472:28
[task 2020-06-16T22:43:34.083Z] 22:43:34     INFO - sendWhenIdle@resource:///modules/sessionstore/ContentSessionStore.jsm:430:14
[task 2020-06-16T22:43:34.083Z] 22:43:34     INFO - sendWhenIdle/<@resource:///modules/sessionstore/ContentSessionStore.jsm:437:48
[task 2020-06-16T22:43:34.083Z] 22:43:34     INFO - 
[task 2020-06-16T22:43:34.083Z] 22:43:34     INFO - Buffered messages finished
[task 2020-06-16T22:43:34.083Z] 22:43:34     INFO - TEST-UNEXPECTED-FAIL | browser/components/aboutlogins/tests/browser/browser_tabKeyNav.js | [JavaScript Error: "Error: TelemetryStopwatch: key "FX_SESSION_RESTORE_CONTENT_COLLECT_DATA_MS" was already initialized" {file: "resource:///modules/sessionstore/ContentSessionStore.jsm" line: 466}]
[task 2020-06-16T22:43:34.083Z] 22:43:34     INFO - send@resource:///modules/sessionstore/ContentSessionStore.jsm:466:28
[task 2020-06-16T22:43:34.083Z] 22:43:34     INFO - sendWhenIdle@resource:///modules/sessionstore/ContentSessionStore.jsm:430:14
[task 2020-06-16T22:43:34.083Z] 22:43:34     INFO - sendWhenIdle/<@resource:///modules/sessionstore/ContentSessionStore.jsm:437:48
[task 2020-06-16T22:43:34.083Z] 22:43:34     INFO -  - 
[task 2020-06-16T22:43:34.083Z] 22:43:34     INFO - Stack trace:
[task 2020-06-16T22:43:34.083Z] 22:43:34     INFO - chrome://mochikit/content/browser-test.js:test_ok:1299
[task 2020-06-16T22:43:34.083Z] 22:43:34     INFO - chrome://mochitests/content/browser/browser/components/aboutlogins/tests/browser/head.js:onConsoleMessage:144
[task 2020-06-16T22:43:34.083Z] 22:43:34     INFO - resource://specialpowers/SpecialPowersChild.jsm:observe/<:158
[task 2020-06-16T22:43:34.083Z] 22:43:34     INFO - Not taking screenshot here: see the one that was previously logged
[task 2020-06-16T22:43:34.083Z] 22:43:34     INFO - TEST-UNEXPECTED-FAIL | browser/components/aboutlogins/tests/browser/browser_tabKeyNav.js | [JavaScript Error: "Error: TelemetryStopwatch: requesting elapsed time for nonexisting stopwatch. Histogram: "FX_SESSION_RESTORE_CONTENT_COLLECT_DATA_MS", key: "historychange"" {file: "resource:///modules/sessionstore/ContentSessionStore.jsm" line: 472}]
[task 2020-06-16T22:43:34.083Z] 22:43:34     INFO - send@resource:///modules/sessionstore/ContentSessionStore.jsm:472:28
[task 2020-06-16T22:43:34.083Z] 22:43:34     INFO - sendWhenIdle@resource:///modules/sessionstore/ContentSessionStore.jsm:430:14
[task 2020-06-16T22:43:34.083Z] 22:43:34     INFO - sendWhenIdle/<@resource:///modules/sessionstore/ContentSessionStore.jsm:437:48