Etherpad plugin for creating a foot note:
Install using npm install ep_foot_note
How to use: Place the cursor where you want to add your footnote and click the "FN" toolbar button to add the foot note. A popup will be shown asking for the footnote text, enter the text and click ok. The footnote will be added to the lastline of the page.
This plugin was developed with etherpad version 1.4.1