Problem with Firefox Yahoo mail

[HTSS_TR]

I'm having problem reading some Yahoo mails with Firefox in few weeks. I had been using Firefox for number of years without any problem, it just happened the last few weeks. One example of the email I received is below, what can I do to be able to read these type of emails ?

This message contains graphics. If you do not see the graphics, click here to view.

DOCTYPE HTML PUBLIC "http://www.w3.org/TR/html4/loose.dtd">

Deck the Halls with ​

 

[tmorris1]

Try clearing cookies, etc

 

[CivicFan]

Looks like the HTML messages show the code as text. Maybe you need to enable HTML email - Yahoo mail probably has an option in account settings.