This is a testharness.js-based test.
Found 6 FAIL, 0 TIMEOUT, 0 NOTRUN.
[FAIL] UserActivation interface: existence and properties of interface object
  assert_false: UserActivation interface should not exist expected false got true
[FAIL] WorkerGlobalScope interface: attribute onoffline
  assert_true: The prototype object must have a property "onoffline" expected true got false
[FAIL] WorkerGlobalScope interface: attribute ononline
  assert_true: The prototype object must have a property "ononline" expected true got false
[FAIL] WorkerGlobalScope interface: self must inherit property "onoffline" with the proper type
  assert_inherits: property "onoffline" not found in prototype chain
[FAIL] WorkerGlobalScope interface: self must inherit property "ononline" with the proper type
  assert_inherits: property "ononline" not found in prototype chain
[FAIL] Worker interface: attribute onmessageerror
  assert_true: The prototype object must have a property "onmessageerror" expected true got false
Harness: the test ran to completion.