Hi,
I tested your website with Chrome&Firefox and Safari.
I don't experience any freezing. But i do notice 2 things.
1- Your website is loading 2 jquery library.
- one comes from K2 Component ( jquery1.8)
- one comes from Virtuemart Component (jquery1.6)
Attachment Pasted_Image_11_15_14__3_57_PM.png not found
One of them should be disabled. Our ZoomEffect requires minimum jQuery1.8, therefore it makes sense to disable the jQuery comes from Virtuemart. (but it might cause some conflict if you disable it through VM Configurations though) so you should better use this plugin:
www.flexiblewebdesign.com/forum-virtuemart-2-template-puremart-support/523-the-easiest-way-to-solve-jquery-conflict-issues
and choose jQuery1.8 from the plugin parameters.
2- Your Large product picture resolution is smaller than the ZoomBox.
There are 2 ways to avoid this happens:
A - Use large resolution product picture. (at least 900x900)
B - Decrease the ZoomBox resolution little bit (decrease the height so it becomes smaller than the large product pic)
Attachment Pasted_Image_11_15_14__4_00_PM.png not found
ZoomBox must be smaller than the large product picture (at least 1px smaller). The picture must touch to edge of the ZoomBox (both vertically and horizontally). Because if it won't touch, ZoomEffect can't calculate the correct ratio after scrolling the mouse-wheel for digital-zooming.
Regards.