Imagus is a browser extension that allows you to view the full size image whenever you hover over the thumbnail. (like hover zoom)
It is useful for when in the thumbnail there is a picture of a receipt or something like that and you can't see it very well. You can then just hover your mouse over the thumbnail and it will show the larger image.
The following is a link to the 'sieve' or custom rule that I wrote for hotukdeals site that you have to import to make it work for this site.