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Getting this error when running some JS tests with Firefox browser TypeError: Cannot read property 'expect' of undefined. They run perfectly fine on chrome.

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Getting this error when running some JS tests with Firefox browser TypeError: Cannot read property 'expect' of undefined. They run perfectly fine on chrome.

Getting this error when running some JS tests with Firefox browser TypeError: Cannot read property 'expect' of undefined. They run perfectly fine on chrome.

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Hmm, if someone posed this question to you without providing a link to a page demonstrating the problem, how would you go about answering it?