We are on CRM 2013 on-premise and our users utilize different browsers like Internet Explorer, Chrome, Firefox, Safari, etc. to access CRM.
Just beginning last week we found an issue that for some reason all note texts look like they all disappear when using Firefox browser (latest update 49.0.1). Taking closer look, it looks like the text color has become the same as the white background. When
I highlight the text it shows the original content of the Notes. Please see screenshot below:

When I highlight the text, it shows up:

So far I tried changing font/background colors to no success. I'm about to ask the same question in Mozilla forum, but just wondering if anyone else has the same problem?
Thanks,
-tri