How to prevent column break within an element?

Question

Consider the following HTML:

    

        
Number one
        
Number two
        &         


        
      

Answer 1

Firefox 26 seems to require

page-break-inside: avoid;

And Chrome 32 needs

-webkit-column-break-inside:avoid;
   -moz-column-break-inside:avoid;
        column-break-inside:avoid;