Please do not ONLY use WebExtensions, read this:
https://forum.palemoon.org/viewtopic.php?t=15928

and make Pale Moon work again.

Огонь

Удобно и безукоризненно! Рекомендую всем.

Oh my god I just had thought that this awesome addon will never get updated! Can't express how excited I am now. Love you and thank you for all of your work!!!

Thanks for the recent update to work with Firefox 57+. Works perfectly in the FF57 beta for me, and seems just as good as the old extension.