It's the range object
for FF, though you can't use document.createRange()
to get the editor selection since the editor content is in an IFrame. Instead, you should use editor.getSelection().getRange();
to get a range object (as demonstrated in the second post of this thread).
With that cleared up, none of this really addresses the problem I'm trying to solve. Therefore, I'm going to start a new thread with the problem stated upfront...