I am using JCE Editor 2.5.2 with Joomla 3.4.3.
I have some textareas in some Zoo pages and JCE Editor activated.
I have Process images for upload set to yes in both the Default and Front-end profile for Clipboard.
In the back-end I can drag and drop image files from Windows File Explorer into a textarea and it seems to process correctly.
However in the front-end I do not get the same behavior. Instead of an uploaded image with the appropriate image tag I get something like "<img src="data:image/png " followed by a large amount of alphanumeric data.
This is the same behavior I get in the back-end when trying to copy and paste an image from Microsoft Word.
I am thinking that neither the Default or Front-end profile is being related to the Front-end.