Probably never (or at least not any time soon): https://forum.palemoon.org/viewtopic.php?f=61&t=28657&p=233334#p233334
Do you know that Basilisk has its own add-on site? https://addons.basilisk-browser.org/extensions/
Do you know that Basilisk has its own add-on site? https://addons.basilisk-browser.org/extensions/