12:07:19 INFO - PROCESS | 9076 | 1453320438830 FirefoxAccounts ERROR device registration failed: ReferenceError: Utils is not defined (resource://gre/modules/FxAccounts.jsm:1428:5) JS Stack trace: _getDeviceType@FxAccounts.jsm:1428:5 < _registerOrUpdateDevice/<@FxAccounts.jsm:1414:48 < Handler.prototype.process@Promise-backend.js:933:23 < this.PromiseWalker.walkerLoop@Promise-backend.js:812:7 < Promise*this.PromiseWalker.scheduleWalkerLoop@Promise-backend.js:743:11 < this.PromiseWalker.schedulePromise@Promise-backend.js:775:7 < this.PromiseWalker.completePromise@Promise-backend.js:710:7 < TaskImpl_run@Task.jsm:320:13 < _do_main@C:\\slave\\test\\build\\tests\\xpcshell\\head.js:208:5 < _execute_test@C:\\slave\\test\\build\\tests\\xpcshell\\head.js:541:5 < @-e:1:1 12:07:19 INFO - PROCESS | 9076 | 1453320438830 FirefoxAccounts ERROR device registration failed: ReferenceError: Utils is not defined (resource://gre/modules/FxAccounts.jsm:1428:5) JS Stack trace: _getDeviceType@FxAccounts.jsm:1428:5 < _registerOrUpdateDevice/<@FxAccounts.jsm:1414:48 < Handler.prototype.process@Promise-backend.js:933:23 < this.PromiseWalker.walkerLoop@Promise-backend.js:812:7 < Promise*this.PromiseWalker.scheduleWalkerLoop@Promise-backend.js:743:11 < this.PromiseWalker.schedulePromise@Promise-backend.js:775:7 < this.PromiseWalker.completePromise@Promise-backend.js:710:7 < TaskImpl_run@Task.jsm:320:13 < _do_main@C:\\slave\\test\\build\\tests\\xpcshell\\head.js:208:5 < _execute_test@C:\\slave\\test\\build\\tests\\xpcshell\\head.js:541:5 < @-e:1:1 12:07:19 INFO - PROCESS | 9076 | 1453320438831 FirefoxAccounts DEBUG _updateAccountData with items: ["isDeviceStale"] 12:07:19 WARNING - TEST-UNEXPECTED-FAIL | services/fxaccounts/tests/xpcshell/test_accounts_device_registration.js | test_updateDeviceRegistration_with_new_device - [test_updateDeviceRegistration_with_new_device : 144] "undefined" == "newly-generated device id"

TB doesn't use Fxaccounts, so we can likely just disable this test.

https://hg.mozilla.org/integration/mozilla-inbound/rev/b8f68d046660ed8f4c885653ec8e8b56354399d8 Bug 1241306 - Disable services/fxaccounts/tests/xpcshell/test_accounts_device_registration.js for Thunderbird. r=markh