sometimes I will right click on the image and then choose "open in new window"
that window will have a URL link on the top of page.
Using the tools ontop the CC typing box, click the mountain pic to the left of the smiley.
(Insert Image). It will open a little box/window that says "Drop image (or click here)
there are 2 icons at the top of that page.
the first is an arrow and allows you to upload stuff from your divice.
the second looks like a chain link.
Pick the chain link and it gives a place for the URl link.
Sometimes this will work and the image will post, sometimes it will only post the url clickable link, and sometimes I can't get it to work at all.