#[markdown(off)]
Filed by: egao [at] mozilla.com

https://treeherder.mozilla.org/logviewer.html#?job_id=234924540&repo=try

https://queue.taskcluster.net/v1/task/fMKayXyTT62RLKWegWnG8g/runs/0/artifacts/public/logs/live_backing.log

Test: mochitest-clipboard

Platform: windows10-aarch64

Context:
05:15:36 INFO - TEST-START | dom/plugins/test/mochitest/test_mixed_case_mime.html
05:15:36 INFO - Not taking screenshot here: see the one that was previously logged
05:15:36 INFO - TEST-UNEXPECTED-FAIL | dom/plugins/test/mochitest/test_mixed_case_mime.html | Frame content shouldn't be empty.
05:15:36 INFO - SimpleTest.ok@SimpleTest/SimpleTest.js:275:18
05:15:36 INFO - frameLoaded@dom/plugins/test/mochitest/test_mixed_case_mime.html:15:5
05:15:36 INFO - onload@dom/plugins/test/mochitest/test_mixed_case_mime.html:1:1
05:15:36 INFO - Not taking screenshot here: see the one that was previously logged
05:15:36 INFO - TEST-UNEXPECTED-FAIL | dom/plugins/test/mochitest/test_mixed_case_mime.html | Frame content should have a plugin.
05:15:36 INFO - SimpleTest.ok@SimpleTest/SimpleTest.js:275:18
05:15:36 INFO - frameLoaded@dom/plugins/test/mochitest/test_mixed_case_mime.html:16:5
05:15:36 INFO - onload@dom/plugins/test/mochitest/test_mixed_case_mime.html:1:1
05:15:36 INFO - Not taking screenshot here: see the one that was previously logged
05:15:36 INFO - TEST-UNEXPECTED-FAIL | dom/plugins/test/mochitest/test_mixed_case_mime.html | uncaught exception - TypeError: plugin is undefined at frameLoaded@http://mochi.test:8888/tests/dom/plugins/test/mochitest/test_mixed_case_mime.html:18:5
05:15:36 INFO - onload@http://mochi.test:8888/tests/dom/plugins/test/mochitest/test_mixed_case_mime.html:1:1
05:15:36 INFO -
05:15:36 INFO - simpletestOnerror@SimpleTest/SimpleTest.js:1665:24
05:15:36 INFO - OnErrorEventHandlerNonNull*@SimpleTest/SimpleTest.js:1645:1
05:15:36 INFO - GECKO(7592) | JavaScript error: http://mochi.test:8888/tests/dom/plugins/test/mochitest/test_mixed_case_mime.html, line 18: TypeError: plugin is undefined
05:15:36 INFO - GECKO(7592) | MEMORY STAT | vsize 5597MB | vsizeMaxContiguous 69862958MB | residentFast 90MB | heapAllocated 14MB
05:15:37 INFO - TEST-OK | dom/plugins/test/mochitest/test_mixed_case_mime.html | took 207ms

This test has been disabled for windows10-aarch64 due to plugin not being supported. See https://phabricator.services.mozilla.com/D25504.