Bug 1623455 Comment 4 Edit History

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The three tests have the same error which is `UnknownError: SecurityError: Permission denied to access property "windowUtils" on cross-origin object`. 

```
flushWindow@chrome://marionette/content/listener.js:1715:17
flushWindow@chrome://marionette/content/listener.js:1733:18
flushRendering@chrome://marionette/content/listener.js:1736:14
maybeResolve@chrome://marionette/content/listener.js:1809:7
paintComplete/<@chrome://marionette/content/listener.js:1824:5
paintComplete@chrome://marionette/content/listener.js:1807:10
reftestWait@chrome://marionette/content/listener.js:1765:9
async*dispatch/</req<@chrome://marionette/content/listener.js:525:17
dispatch/<@chrome://marionette/content/listener.js:520:15
MessageListener.receiveMessage*startListeners@chrome://marionette/content/listener.js:605:21
registerSelf@chrome://marionette/content/listener.js:501:5
@chrome://marionette/content/listener.js:1855:1
```
The three tests only happened when `--enable-fission` and have the same error which is `UnknownError: SecurityError: Permission denied to access property "windowUtils" on cross-origin object`. 

```
flushWindow@chrome://marionette/content/listener.js:1715:17
flushWindow@chrome://marionette/content/listener.js:1733:18
flushRendering@chrome://marionette/content/listener.js:1736:14
maybeResolve@chrome://marionette/content/listener.js:1809:7
paintComplete/<@chrome://marionette/content/listener.js:1824:5
paintComplete@chrome://marionette/content/listener.js:1807:10
reftestWait@chrome://marionette/content/listener.js:1765:9
async*dispatch/</req<@chrome://marionette/content/listener.js:525:17
dispatch/<@chrome://marionette/content/listener.js:520:15
MessageListener.receiveMessage*startListeners@chrome://marionette/content/listener.js:605:21
registerSelf@chrome://marionette/content/listener.js:501:5
@chrome://marionette/content/listener.js:1855:1
```

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