Presenter 13 and Firefox Issues

I am working on publishing a module to our LMS system. My coworker and I both tested the module. He found an issue when viewing the module in Firefox. The module appears to shrink and move to the corner of the browser screen (it worked fine for me). We both have Firefox 24.0 the only difference between the two browsers is our version of Shockwave Flash. I have version 11.8.800.94 (Shockwave 11.8 r800) and he has version 11.9.900.117 (Shockwave 11.9 r900). See images below (image one is 11.9 image two is 11.8)

Is there a fix for this/is this a known issue?

Thanks,

Kathleen