URL: https://us.etrade.com/e/t/user/login

Browser / Version: Firefox Nightly (should be reproducible on release as well)
Operating System: Windows 10
Tested Another Browser: Yes Chrome

Problem type: Something else
Description: Wrong error message is displayed on incorrect login
Steps to Reproduce:

1. Visit https://us.etrade.com/e/t/user/login
2. Type random stuff in to the User ID and password fields and submit the form

Chrome users see this error message:

Firefox users see this error message:

Regression range:
https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=ca257801d86f5d4e9c1768722c7131216c07d38f&tochange=4be2a981c307898ac2858db37872044a962d922c

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