Bug 1779427 Comment 8 Edit History
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Maybe this: https://treeherder.mozilla.org/jobs?repo=autoland&group_state=expanded&selectedTaskRun=b8ZOEjv8SG-RHrKU7jT_Xg.0&resultStatus=testfailed%2Cbusted%2Cexception%2Cretry%2Cusercancel&revision=676ab9a6746eab17035a90e83b6e85e86dafbc67&searchStr=Windows%2C10%2Cx86%2C2004%2CWebRender%2Cdebug%2CMochitests%2Ctest-windows10-32-2004-qr%2Fdebug-mochitest-browser-chrome%2Cbc2 will help you in any way, because this is perma and it has the Assertion failure