Cannot create account using Firefox 78

I was directed to post this issue here, since the website referenced below uses Discourse.

Steps to reproduce

  1. Went to in Firefox browser
  2. Clicked on “Sign Up” button in top right corner
  3. Prompt appears allowing me to enter details; I entered the details I wanted to use
  4. Click on Create New Account button

Expected result

Expected result was to create a new account

Actual result

Could not create account because the username field shows the error, “Checking username availability” indefinitely, regardless of what I enter.


  • Operating system: Windows 10 Pro
  • Browser: Firefox 78.7.1esr 64-bit

Additional information

  • The issue existed in a private window also.
  • I was able to create an account using Microsoft Edge, and then sign in in Firefox.

I can’t reproduce on latest Firefox, so I recommend updating your browser (per docs we support the latest version of each browser, no exceptions for ESR and the like)

1 Like

Did you try in Firefox Safe Mode?