Hi there,
Thank you for your feedback! We appreciate your love for Adblock Plus!
Firefox isn't actually actively removing us. They were experiencing a widespread issue today due to a certification issue on their side.
Mozilla has already pushed an update and it should be fixed within the next couple of hours: https://blog.mozilla.org/addons/2019/05/04/update-regarding-add-ons-in-firefox/

Jessy
ABP Support Team