Filed by: rmaries [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer.html#?job_id=318338331&repo=mozilla-release
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/XEJ23qOeTfCdA9PJfWurkQ/runs/0/artifacts/public/logs/live_backing.log

[task 2020-10-12T09:47:23.074Z] 09:47:23     INFO - TEST-START | toolkit/components/printing/tests/browser_modal_print.js
[task 2020-10-12T09:47:27.258Z] 09:47:27     INFO - TEST-PASS | toolkit/components/printing/tests/browser_modal_print.js | The dialog exists - 
[task 2020-10-12T09:47:27.258Z] 09:47:27     INFO - Buffered messages finished
[task 2020-10-12T09:47:27.259Z] 09:47:27     INFO - TEST-UNEXPECTED-FAIL | toolkit/components/printing/tests/browser_modal_print.js | Initial focus on printer picker - Got [object HTMLBodyElement], expected [object HTMLSelectElement]
[task 2020-10-12T09:47:27.259Z] 09:47:27     INFO - Stack trace:
[task 2020-10-12T09:47:27.259Z] 09:47:27     INFO - chrome://mochikit/content/browser-test.js:test_is:1332
[task 2020-10-12T09:47:27.260Z] 09:47:27     INFO - chrome://mochitests/content/browser/toolkit/components/printing/tests/browser_modal_print.js:testTabOrder/<:81
[task 2020-10-12T09:47:27.260Z] 09:47:27     INFO - TEST-PASS | toolkit/components/printing/tests/browser_modal_print.js | The dialog exists - ```