Bug 1832924 Comment 3 Edit History

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Backed out for causing bc failures in browser/components/shell/test/browser_headless_screenshot

Backout link: https://hg.mozilla.org/integration/autoland/rev/f4a2b3daf6f7be5af712fbef88d8655ee539c512

[Push with failures](https://treeherder.mozilla.org/jobs?repo=autoland&group_state=expanded&selectedTaskRun=UnLsLOMoQDuIgzWcEfYAfQ.0&resultStatus=testfailed%2Cbusted%2Cexception%2Crunnable&searchStr=linux%2C18.04%2Cx64%2Cwebrender%2Cdebug%2Cmochitests%2Cwith%2Csoftware%2Cwebrender%2Cenabled%2Ctest-linux1804-64-qr%2Fdebug-mochitest-browser-chrome-swr%2Cbc3&revision=95e00e27a57bc27a803771831873dfa19d092033)

[Failure log -> TEST-UNEXPECTED-FAIL | browser/components/shell/test/browser_headless_screenshot_1.js | Uncaught exception in test bound  - at resource://gre/modules/subprocess/subprocess_unix.sys.mjs:41](https://treeherder.mozilla.org/logviewer?job_id=418155327&repo=autoland&lineNumber=2804)

L.E. 
Also these failures:
[xpc failure -> toolkit/modules/subprocess/test/xpcshell/test_subprocess.js ](https://treeherder.mozilla.org/logviewer?job_id=418159104&repo=autoland&lineNumber=3055)
[xpc failure -> toolkit/mozapps/update/tests/unit_aus_update/updateSyncManager.js](https://treeherder.mozilla.org/logviewer?job_id=418162702&repo=autoland&lineNumber=3174) 
[xpc failure -> xpcshell-remote.ini:toolkit/components/extensions/test/xpcshell/test_native_manifests.js](https://treeherder.mozilla.org/logviewer?job_id=418159134&repo=autoland&lineNumber=3138)

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