A User of Bjorn's Endnotes
This add-on is a waste of time. It fails to install the first time, and requires too many unreasonable permissions, such as accessing the document when I'm not using Google Docs.
There's no documentation, which wouldn't be a problem if it had an intuitive or at least sensible user interface. Half the controls are off-screen, regardless of window size. The controls do not follow any of the robust modern or classic typesetting or desktop publishing UX paradigms.
It's easier and less time to download the document as a file and then do the necessary work in Word or OpenOffice.