web interface to Verizon email stopped working on Linux

The web interface to Verizon email was working for me on LInux (Firefox 45.0.2 running on Red Hat Enterprise Linux Server release 6.5) on Oct. 30, 2016, but now on Nov. 1, 2016 https://webmail.verizon.com/signin appears as a blank web page.

Are there any other Linux users out there who are experiencing this problem?

Note that the web interface still works for me on Windows (Firefox 45.4.0 running on Windows 7 Enterprise Service Pack 1).