Web page images, selected text, links etc. while appearing to be draggable (drag and drop), i.e., a thumb-name image with plus sign appear, but upon release of the mouse button, do not appear in the collection.
However, the context menu (right mouse button click) of the same images, selected text, links etc. shows an "Add to Collections" menu item that does work, i.e., the image, selected text, links appear in the collection.
What am I missing?...what is preventing drag-n-drop from working?