Login Firefox plugin not working

🐞Bug Reports
#1

To get your bug fixed faster please try to answer the following questions:

  1. Which browser, operating system and versions of those are you using?
    Mac OSX (10.15.5), Firefox (76.0.1)

  2. What are the steps you took that lead to the bug?
    Try to login to premium account - not working. (Works in Chromium)

#2

Do you have any scriptblockers and/or the firefox containers extension enabled?
That has been causing issues in the past.