@dwardoric upgrade to 66.0.4 (or 60.6.2 for ESR) and it should be fixed..?https://blog.mozilla.org/addons/2019/05/04/update-regarding-add-ons-in-firefox/
Why is this step necessary? mstdn.binfalse.de might not be the server where you are registered, so we need to redirect you to your home server first. Don't have an account? You can sign up here
mstdn.binfalse.de