Bugzilla

Backed out for causing reftest failures.

Backout link: https://hg.mozilla.org/integration/autoland/rev/c4cec23bed47e330173e9d1d32843abd41b892af

[Push with failures](https://treeherder.mozilla.org/jobs?repo=autoland&selectedTaskRun=fIq5r0d2QA2BURgx69J8jg.0&resultStatus=testfailed%2Cbusted%2Cexception%2Crunnable&revision=fd5889a344a9b8edf139572633c073ad3539e14b&searchStr=linux%2C18.04%2Cx64%2Cwebrender%2Cdebug%2Cmochitests%2Cwithout%2Ce10s%2Cor%2Cfission%2Ctest-linux1804-64-qr%2Fdebug-mochitest-chrome-1proc%2Cc2)

[Failure log](https://treeherder.mozilla.org/logviewer?job_id=401755432&repo=autoland&lineNumber=4518)

```
INFO - TEST-PASS | toolkit/content/tests/widgets/test_menubar.xhtml | cursor down on menu event target ID filepopup 
[task 2023-01-09T08:01:02.026Z] 08:01:02     INFO - Buffered messages finished
[task 2023-01-09T08:01:02.027Z] 08:01:02     INFO - TEST-UNEXPECTED-FAIL | toolkit/content/tests/widgets/test_menubar.xhtml | cursor down on menu event type popupshown fired - got "popupshown", expected "DOMMenuItemActive"
[task 2023-01-09T08:01:02.027Z] 08:01:02     INFO - SimpleTest.is@chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:487:14
[task 2023-01-09T08:01:02.027Z] 08:01:02     INFO - is@chrome://mochitests/content/chrome/toolkit/content/tests/widgets/popup_shared.js:92:30
[task 2023-01-09T08:01:02.027Z] 08:01:02     INFO - eventOccurred@chrome://mochitests/content/chrome/toolkit/content/tests/widgets/popup_shared.js:154:9
[task 2023-01-09T08:01:02.028Z] 08:01:02     INFO - Not taking screenshot here: see the one that was previously logged
[task 2023-01-09T08:01:02.028Z] 08:01:02     INFO - TEST-UNEXPECTED-FAIL | toolkit/content/tests/widgets/test_menubar.xhtml | cursor down on menu event target ID helppopup - got "helppopup", expected "contents"
[task 2023-01-09T08:01:02.029Z] 08:01:02     INFO - SimpleTest.is@chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:487:14
[task 2023-01-09T08:01:02.029Z] 08:01:02     INFO - is@chrome://mochitests/content/chrome/toolkit/content/tests/widgets/popup_shared.js:92:30
[task 2023-01-09T08:01:02.029Z] 08:01:02     INFO - eventOccurred@chrome://mochitests/content/chrome/toolkit/content/tests/widgets/popup_shared.js:159:9
[task 2023-01-09T08:01:02.030Z] 08:01:02     INFO - TEST-PASS | toolkit/content/tests/widgets/test_menubar.xhtml | cursor down on menu popupshown state

Backed out for causing reftest failures.

Backout link: https://hg.mozilla.org/integration/autoland/rev/c4cec23bed47e330173e9d1d32843abd41b892af

[Push with failures](https://treeherder.mozilla.org/jobs?repo=autoland&resultStatus=testfailed%2Cbusted%2Cexception&searchStr=linux%2C18.04%2Cx64%2Cwebrender%2Cdebug%2Creftests%2Ctest-linux1804-64-qr%2Fdebug-reftest-snapshot%2Crs8&revision=c34c31220275e1d3d3625d8515cda2334ee46f2b&selectedTaskRun=f8YMkwB3SSyzg-CdFedfNg.0)

[Failure log](https://treeherder.mozilla.org/logviewer?job_id=401779225&repo=autoland&lineNumber=9042)