[Tracking Requested - why for this release]:
Central as beta-simulation: https://treeherder.mozilla.org/#/jobs?repo=try&selectedJob=282591253&resultStatus=success%2Ctestfailed%2Cbusted%2Cexception%2Cretry%2Cusercancel%2Crunnable&revision=11f75cc87882200a3e5d6159f83608b33760137b&searchStr=xpc&group_state=expanded

Failure log: https://treeherder.mozilla.org/logviewer.html#?job_id=282591253&repo=try

[task 2019-12-25T13:11:09.759Z] 13:11:09 INFO - TEST-PASS | xpcshell.ini:browser/components/extensions/test/xpcshell/test_ext_urlbar.js | test_nonPrivateBrowsing - [test_nonPrivateBrowsing : 1412] 1 == 1
[task 2019-12-25T13:11:09.759Z] 13:11:09 INFO - PID 16292 | ###!!! [Child][MessageChannel] Error: (msgtype=0x370132,name=PContent::Msg_AsyncMessage) Channel closing: too late to send/recv, messages will be lost
[task 2019-12-25T13:11:09.759Z] 13:11:09 INFO - PID 16292 | [Child 16912, Main Thread] WARNING: MsgDropped in ContentChild: file /builds/worker/workspace/build/src/dom/ipc/ContentChild.cpp, line 2452
[task 2019-12-25T13:11:09.759Z] 13:11:09 INFO - (xpcshell/head.js) | test run_next_test 22 pending (2)
[task 2019-12-25T13:11:09.759Z] 13:11:09 INFO - (xpcshell/head.js) | test test_nonPrivateBrowsing finished (2)
[task 2019-12-25T13:11:09.760Z] 13:11:09 INFO - xpcshell.ini:browser/components/extensions/test/xpcshell/test_ext_urlbar.js | Starting test_setOpenViewOnFocus
[task 2019-12-25T13:11:09.760Z] 13:11:09 INFO - (xpcshell/head.js) | test test_setOpenViewOnFocus pending (2)
[task 2019-12-25T13:11:09.760Z] 13:11:09 WARNING - TEST-UNEXPECTED-FAIL | xpcshell.ini:browser/components/extensions/test/xpcshell/test_ext_urlbar.js | test_setOpenViewOnFocus - [test_setOpenViewOnFocus : 1421] Open-view-on-focus mode should be enabled by default - false == true
[task 2019-12-25T13:11:09.760Z] 13:11:09 INFO - /builds/worker/workspace/build/tests/xpcshell/tests/browser/components/extensions/test/xpcshell/test_ext_urlbar.js:test_setOpenViewOnFocus:1421
[task 2019-12-25T13:11:09.760Z] 13:11:09 INFO - /builds/worker/workspace/build/tests/xpcshell/head.js:run_next_test/_run_next_test/<:1567
[task 2019-12-25T13:11:09.760Z] 13:11:09 INFO - /builds/worker/workspace/build/tests/xpcshell/head.js:_run_next_test:1567
[task 2019-12-25T13:11:09.761Z] 13:11:09 INFO - /builds/worker/workspace/build/tests/xpcshell/head.js:run:735
[task 2019-12-25T13:11:09.761Z] 13:11:09 INFO - /builds/worker/workspace/build/tests/xpcshell/head.js:_do_main:246
[task 2019-12-25T13:11:09.761Z] 13:11:09 INFO - /builds/worker/workspace/build/tests/xpcshell/head.js:_execute_test:573
[task 2019-12-25T13:11:09.761Z] 13:11:09 INFO - -e:null:1
[task 2019-12-25T13:11:09.761Z] 13:11:09 INFO - exiting test
[task 2019-12-25T13:11:09.761Z] 13:11:09 INFO - (xpcshell/head.js) | test run_next_test 22 finished (2)
[task 2019-12-25T13:11:09.761Z] 13:11:09 INFO - Unexpected exception NS_ERROR_ABORT:
[task 2019-12-25T13:11:09.762Z] 13:11:09 INFO - _abort_failed_test@/builds/worker/workspace/build/tests/xpcshell/head.js:791:20
[task 2019-12-25T13:11:09.762Z] 13:11:09 INFO - do_report_result@/builds/worker/workspace/build/tests/xpcshell/head.js:892:5
[task 2019-12-25T13:11:09.762Z] 13:11:09 INFO - Assert<@/builds/worker/workspace/build/tests/xpcshell/head.js:67:21
[task 2019-12-25T13:11:09.762Z] 13:11:09 INFO - proto.report@resource://testing-common/Assert.jsm:233:10
[task 2019-12-25T13:11:09.762Z] 13:11:09 INFO - equal@resource://testing-common/Assert.jsm:275:8
[task 2019-12-25T13:11:09.762Z] 13:11:09 INFO - test_setOpenViewOnFocus@/builds/worker/workspace/build/tests/xpcshell/tests/browser/components/extensions/test/xpcshell/test_ext_urlbar.js:1421:10
[task 2019-12-25T13:11:09.762Z] 13:11:09 INFO - run_next_test/_run_next_test/<@/builds/worker/workspace/build/tests/xpcshell/head.js:1567:22
[task 2019-12-25T13:11:09.763Z] 13:11:09 INFO - _run_next_test@/builds/worker/workspace/build/tests/xpcshell/head.js:1567:38
[task 2019-12-25T13:11:09.763Z] 13:11:09 INFO - run@/builds/worker/workspace/build/tests/xpcshell/head.js:735:9
[task 2019-12-25T13:11:09.763Z] 13:11:09 INFO - _do_main@/builds/worker/workspace/build/tests/xpcshell/head.js:246:6
[task 2019-12-25T13:11:09.763Z] 13:11:09 INFO - _execute_test@/builds/worker/workspace/build/tests/xpcshell/head.js:573:5
[task 2019-12-25T13:11:09.763Z] 13:11:09 INFO - @-e:1:1
[task 2019-12-25T13:11:09.763Z] 13:11:09 INFO - exiting test
[task 2019-12-25T13:11:09.764Z] 13:11:09 INFO - PID 16292 | 1577279467871 addons.manager DEBUG before shutdown
[task 2019-12-25T13:11:09.764Z] 13:11:09 INFO - PID 16292 | 1577279467872 addons.manager DEBUG shutdown
[task 2019-12-25T13:11:09.764Z] 13:11:09 INFO - PID 16292 | 1577279467875 addons.manager DEBUG Calling shutdown blocker for XPIProvider
[task 2019-12-25T13:11:09.764Z] 13:11:09 INFO - PID 16292 | 1577279467875 addons.xpi DEBUG shutdown
[task 2019-12-25T13:11:09.764Z] 13:11:09 INFO - PID 16292 | 1577279467876 addons.xpi-utils DEBUG shutdown
[task 2019-12-25T13:11:09.765Z] 13:11:09 INFO - PID 16292 | 1577279467876 addons.manager DEBUG Calling shutdown blocker for GMPProvider
[task 2019-12-25T13:11:09.765Z] 13:11:09 INFO - PID 16292 | 1577279467878 addons.manager DEBUG Calling shutdown blocker for PluginProvider
[task 2019-12-25T13:11:09.765Z] 13:11:09 INFO - PID 16292 | 1577279467892 addons.manager DEBUG Async provider shutdown done
[task 2019-12-25T13:11:09.765Z] 13:11:09 INFO - "CONSOLE_MESSAGE: (info) 1577279467871 addons.manager DEBUG before shutdown"
[task 2019-12-25T13:11:09.765Z] 13:11:09 INFO - "CONSOLE_MESSAGE: (info) 1577279467872 addons.manager DEBUG shutdown"
[task 2019-12-25T13:11:09.766Z] 13:11:09 INFO - "CONSOLE_MESSAGE: (info) 1577279467875 addons.manager DEBUG Calling shutdown blocker for XPIProvider"
[task 2019-12-25T13:11:09.766Z] 13:11:09 INFO - "CONSOLE_MESSAGE: (info) 1577279467875 addons.xpi DEBUG shutdown"
[task 2019-12-25T13:11:09.766Z] 13:11:09 INFO - "CONSOLE_MESSAGE: (info) 1577279467876 addons.xpi-utils DEBUG shutdown"
[task 2019-12-25T13:11:09.766Z] 13:11:09 INFO - "CONSOLE_MESSAGE: (info) 1577279467876 addons.manager DEBUG Calling shutdown blocker for GMPProvider"
[task 2019-12-25T13:11:09.767Z] 13:11:09 INFO - "CONSOLE_MESSAGE: (info) 1577279467878 addons.manager DEBUG Calling shutdown blocker for PluginProvider"
[task 2019-12-25T13:11:09.767Z] 13:11:09 INFO - "CONSOLE_MESSAGE: (info) 1577279467892 addons.manager DEBUG Async provider shutdown done"
[task 2019-12-25T13:11:09.767Z] 13:11:09 INFO - PID 16292 | nsStringStats
[task 2019-12-25T13:11:09.768Z] 13:11:09 INFO - PID 16292 | => mAllocCount: 8312
[task 2019-12-25T13:11:09.768Z] 13:11:09 INFO - PID 16292 | => mReallocCount: 0
[task 2019-12-25T13:11:09.768Z] 13:11:09 INFO - PID 16292 | => mFreeCount: 8312
[task 2019-12-25T13:11:09.769Z] 13:11:09 INFO - PID 16292 | => mShareCount: 4516
[task 2019-12-25T13:11:09.769Z] 13:11:09 INFO - PID 16292 | => mAdoptCount: 77
[task 2019-12-25T13:11:09.769Z] 13:11:09 INFO - PID 16292 | => mAdoptFreeCount: 77
[task 2019-12-25T13:11:09.769Z] 13:11:09 INFO - PID 16292 | => Process ID: 16464, Thread ID: 140069764649408
[task 2019-12-25T13:11:09.770Z] 13:11:09 INFO - PID 16292 | [Child 16912, Main Thread] WARNING: Extra shutdown CC: 'i < NORMAL_SHUTDOWN_COLLECTIONS', file /builds/worker/workspace/build/src/xpcom/base/nsCycleCollector.cpp, line 3361
[task 2019-12-25T13:11:09.770Z] 13:11:09 INFO - PID 16292 | nsStringStats
[task 2019-12-25T13:11:09.770Z] 13:11:09 INFO - PID 16292 | => mAllocCount: 6893
[task 2019-12-25T13:11:09.770Z] 13:11:09 INFO - PID 16292 | => mReallocCount: 0
[task 2019-12-25T13:11:09.770Z] 13:11:09 INFO - PID 16292 | => mFreeCount: 6893
[task 2019-12-25T13:11:09.770Z] 13:11:09 INFO - PID 16292 | => mShareCount: 3508
[task 2019-12-25T13:11:09.770Z] 13:11:09 INFO - PID 16292 | => mAdoptCount: 268
[task 2019-12-25T13:11:09.771Z] 13:11:09 INFO - PID 16292 | => mAdoptFreeCount: 276
[task 2019-12-25T13:11:09.771Z] 13:11:09 INFO - PID 16292 | => Process ID: 16912, Thread ID: 139845069922752
[task 2019-12-25T13:11:09.771Z] 13:11:09 INFO - PID 16292 | ###!!! [Child][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2019-12-25T13:11:09.771Z] 13:11:09 INFO - PID 16292 | nsStringStats
[task 2019-12-25T13:11:09.771Z] 13:11:09 INFO - PID 16292 | => mAllocCount: 909
[task 2019-12-25T13:11:09.771Z] 13:11:09 INFO - PID 16292 | => mReallocCount: 0
[task 2019-12-25T13:11:09.772Z] 13:11:09 INFO - PID 16292 | => mFreeCount: 909
[task 2019-12-25T13:11:09.772Z] 13:11:09 INFO - PID 16292 | => mShareCount: 405
[task 2019-12-25T13:11:09.772Z] 13:11:09 INFO - PID 16292 | => mAdoptCount: 0
[task 2019-12-25T13:11:09.772Z] 13:11:09 INFO - PID 16292 | => mAdoptFreeCount: 0
[task 2019-12-25T13:11:09.772Z] 13:11:09 INFO - PID 16292 | => Process ID: 16323, Thread ID: 140356881072576
[task 2019-12-25T13:11:09.772Z] 13:11:09 INFO - PID 16292 | [Parent 16292, Main Thread] WARNING: Extra shutdown CC: 'i < NORMAL_SHUTDOWN_COLLECTIONS', file /builds/worker/workspace/build/src/xpcom/base/nsCycleCollector.cpp, line 3361
[task 2019-12-25T13:11:09.772Z] 13:11:09 INFO - PID 16292 | nsStringStats
[task 2019-12-25T13:11:09.773Z] 13:11:09 INFO - PID 16292 | => mAllocCount: 84373
[task 2019-12-25T13:11:09.773Z] 13:11:09 INFO - PID 16292 | => mReallocCount: 0
[task 2019-12-25T13:11:09.773Z] 13:11:09 INFO - PID 16292 | => mFreeCount: 84373
[task 2019-12-25T13:11:09.773Z] 13:11:09 INFO - PID 16292 | => mShareCount: 76649
[task 2019-12-25T13:11:09.773Z] 13:11:09 INFO - PID 16292 | => mAdoptCount: 1296
[task 2019-12-25T13:11:09.773Z] 13:11:09 INFO - PID 16292 | => mAdoptFreeCount: 1472
[task 2019-12-25T13:11:09.773Z] 13:11:09 INFO - PID 16292 | => Process ID: 16292, Thread ID: 140523001471424
[task 2019-12-25T13:11:09.774Z] 13:11:09 INFO - <<<<<<<
[task 2019-12-25T13:11:09.774Z] 13:11:09 INFO - INFO | Result summary:
[task 2019-12-25T13:11:09.774Z] 13:11:09 INFO - INFO | Passed: 563
[task 2019-12-25T13:11:09.774Z] 13:11:09 WARNING - INFO | Failed: 1
[task 2019-12-25T13:11:09.774Z] 13:11:09 WARNING - One or more unittests failed.
[task 2019-12-25T13:11:09.774Z] 13:11:09 INFO - INFO | Todo: 0
[task 2019-12-25T13:11:09.774Z] 13:11:09 INFO - INFO | Retried: 2
[task 2019-12-25T13:11:09.775Z] 13:11:09 INFO - SUITE-END | took 849s
[task 2019-12-25T13:11:09.775Z] 13:11:09 INFO - Node moz-http2 server shutting down ...
[task 2019-12-25T13:11:09.805Z] 13:11:09 ERROR - Return code: 1
[task 2019-12-25T13:11:09.806Z] 13:11:09 INFO - TinderboxPrint: xpcshell-xpcshell<br/>563/<em class="testfail">1</em>/0
[task 2019-12-25T13:11:09.806Z] 13:11:09 WARNING - # TBPL FAILURE #
[task 2019-12-25T13:11:09.806Z] 13:11:09 WARNING - setting return code to 2
[task 2019-12-25T13:11:09.807Z] 13:11:09 WARNING - The xpcshell suite: xpcshell ran with return status: FAILURE
[task 2019-12-25T13:11:09.808Z] 13:11:09 INFO - Running post-action listener: _package_coverage_data
[task 2019-12-25T13:11:09.808Z] 13:11:09 INFO - Running post-action listener: _resource_record_post_action
[task 2019-12-25T13:11:09.808Z] 13:11:09 INFO - Running post-action listener: process_java_coverage_data
[task 2019-12-25T13:11:09.808Z] 13:11:09 INFO - [mozharness: 2019-12-25 13:11:09.806683Z] Finished run-tests step (success)
[task 2019-12-25T13:11:09.808Z] 13:11:09 INFO - Running post-run listener: _resource_record_post_run
[task 2019-12-25T13:11:09.881Z] 13:11:09 INFO - Validating Perfherder data against /builds/worker/workspace/mozharness/external_tools/performance-artifact-schema.json
[task 2019-12-25T13:11:09.885Z] 13:11:09 INFO - PERFHERDER_DATA: {"framework": {"name": "job_resource_usage"}, "suites": [{"subtests": [{"name": "cpu_percent", "value": 97.97517441860468}, {"name": "io_write_bytes", "value": 3081465856}, {"name": "io.read_bytes", "value": 2711552}, {"name": "io_write_time", "value": 287408}, {"name": "io_read_time", "value": 44}], "extraOptions": ["e10s", "taskcluster-m5.large"], "name": "xpcshell.xpcshell.1.overall"}, {"subtests": [{"name": "time", "value": 0.027446985244750977}], "name": "xpcshell.xpcshell.1.start-pulseaudio"}, {"subtests": [{"name": "time", "value": 9.829138994216919}, {"name": "cpu_percent", "value": 50.25}], "name": "xpcshell.xpcshell.1.install"}, {"subtests": [{"name": "time", "value": 0.017199993133544922}], "name": "xpcshell.xpcshell.1.stage-files"}, {"subtests": [{"name": "time", "value": 851.4507839679718}, {"name": "cpu_percent", "value": 98.53388235294119}], "name": "xpcshell.xpcshell.1.run-tests"}]}
[task 2019-12-25T13:11:09.886Z] 13:11:09 INFO - Total resource usage - Wall time: 861s; CPU: 99.0%; Read bytes: 2711552; Write bytes: 3081465856; Read time: 44; Write time: 287408
[task 2019-12-25T13:11:09.886Z] 13:11:09 INFO - TinderboxPrint: CPU usage<br/>98.5%
[task 2019-12-25T13:11:09.887Z] 13:11:09 INFO - TinderboxPrint: I/O read bytes / time<br/>2,711,552 / 44
[task 2019-12-25T13:11:09.887Z] 13:11:09 INFO - TinderboxPrint: I/O write bytes / time<br/>3,081,465,856 / 287,408
[task 2019-12-25T13:11:09.887Z] 13:11:09 INFO - TinderboxPrint: CPU idle<br/>33.4 (1.9%)
[task 2019-12-25T13:11:09.888Z] 13:11:09 INFO - TinderboxPrint: CPU system<br/>118.4 (6.9%)
[task 2019-12-25T13:11:09.888Z] 13:11:09 INFO - TinderboxPrint: CPU user<br/>1,568.2 (91.1%)
[task 2019-12-25T13:11:09.888Z] 13:11:09 INFO - TinderboxPrint: Swap in / out<br/>0 / 0
[task 2019-12-25T13:11:09.889Z] 13:11:09 INFO - start-pulseaudio - Wall time: 0s; CPU: Can't collect data; Read bytes: 0; Write bytes: 0; Read time: 0; Write time: 0
[task 2019-12-25T13:11:09.889Z] 13:11:09 INFO - install - Wall time: 10s; CPU: 50.0%; Read bytes: 0; Write bytes: 45481984; Read time: 0; Write time: 35864
[task 2019-12-25T13:11:09.890Z] 13:11:09 INFO - stage-files - Wall time: 0s; CPU: Can't collect data; Read bytes: 0; Write bytes: 0; Read time: 0; Write time: 0
[task 2019-12-25T13:11:09.895Z] 13:11:09 INFO - run-tests - Wall time: 851s; CPU: 99.0%; Read bytes: 2711552; Write bytes: 3035983872; Read time: 44; Write time: 251544
[task 2019-12-25T13:11:10.016Z] 13:11:10 WARNING - returning nonzero exit status 2

This is a regression from Bug 1603778 https://hg.mozilla.org/mozilla-central/rev/bdb51063d530
Dao, Harry please take a look over it. Thank you.

We can probably fix this by removing the openViewOnFocus API along with this test.

This API is no longer needed, seeing as the Top Sites experiment is over. Dao suggested in bug 1605958 comment 1 that it be removed.

https://hg.mozilla.org/mozilla-central/rev/09417381f879

Fix verified in today's beta-sim: https://treeherder.mozilla.org/#/jobs?repo=try&resultStatus=success%2Ctestfailed%2Cbusted%2Cexception%2Cretry%2Cusercancel%2Crunnable&revision=75154cf5ede0bc8e86fbead9dc251e6b95646b64&searchStr=xpc&group_state=expanded&selectedJob=283123900