Yes! A WebExtension version of Clippings is in the works and will be released at around the same time as Firefox 57. See http://aecreations.blogspot.ca/2017/07/compatibility-with-firefox-57.html for more info.
The Mozilla team is rolling out a fix for Firefox which should resolve the certificate issue affecting all add-ons. See their Twitter feed for details: https://twitter.com/mozamo/status/1124627930301255680