IE image loading - when i drag around 20 images and drop it at drop area then images got stuck on "Processing". This is a issue in core plugin. Check the original plugin (
https://blueimp.github.io/jQuery-File-Upload/) open it in IE 9+ and drag 20 or more photos, it will stuck with a message "Processing".
To resolve this, you need to do a small change in jquery.fileupload-image.js. In this file find "loadImageFileTypes" and change file extensions as per your requirement. Then clear cache of IE test it. It will be done.