Unable to Print or Export to PDF in Firefox 6! But, works in other Browsers

Unable to Print or Export to PDF in Firefox 6! But, works in other Browsers

A search didn't find anything on the forums for this new issue of mine.  In the last couple of weeks, I am unable to successfully Print or Export to PDF for invoices using Firefox 6.  The window appears for a split second and disappears.  Doesn't matter what I do to the browser or computer.  But, if I open Zoho Books in Chrome, it works as expected.  I've been a Firefox user for quite a while so hoping there is a resolution for this issue. 

Thanks for any help!