Since installing the cart software, I now can't seem to access the Page Settings > Advanced Settings area when I click Settings from the module menu

I want to move my BuyNow module to a different page, but when I go to Settings >> Page Settings >> Advanced Settings to access the move to page function, whenever I try to expand the Advanced Settings section, it just collapses everything ...

Any ideas?

EDIT: This seems to be isolated to FireFox ... resolved by using a different browser ...