Warning: You take full responsibility for any action you perform using segregate-refs.js. You must read and understand Wikipedia policies and use this tool within these policies, or risk being blocked from editing.
Instructions on how to install and use the script are at /Short instructions.
This page in a nutshell: Temporarily moves footnotes to a separate text box on the edit screen, adding them back in when the page is saved.
References segregator (segregate-refs.js) is a user script by PleaseStand – an attempt to make editing articles that have many citation templates easier. It works by moving the first non-empty occurrence of a <ref> tag to a separate text box that is below the main editing textbox. That first occurrence of the ref is replaced by a short tag as if there were an identical reference before it. It is also capable of migrating articles to the list-defined references format (LDR).