To add a Blurred Effect on Hover simply add the custom CSS classname "blurred" to the items Custom Classlist:
![blurred custom classlist](/images/extensions/nxd_custom_quickicons/blurred_custom_classlist.jpeg)
On Mouseover the Background Image on the first item got blurred:
![blurred](/images/extensions/nxd_custom_quickicons/blurred.jpeg)
As you might think the effect only affects Quicklinks with Background images and can be set seperately for each item.