https://github.com/greasemonkey/greasemonkey/commit/75372b2040426eeb36b162c4050546ee8580981e
Greasemonkey is a user script manager for Firefox. - Clone the responseXML.documentElement in GM_xhr callbacks. · greasemonkey/greasemonkey@75372b2
clonegmxhrcallbacksgreasemonkey
https://velog.io/tags/xhr
xhr