auth.atlassian.com not working on firefox

Question

I used Trello without any problems on firefox - until I had to migrate the account to atlassian. Now the authentification always reroutes via auth.atlassian.com. Which does not work on Firefox (even with all add-ons switched off).

Please implement a solution ASAP: either adjust to Firefox or leave the authentification on HTML5.

I am not sure about other browsers but I am unhappy to having to use Chrome just for logging in to trello.com (Trello itself works fine on Firefox).

V_ L_ Plän · Answer

Thank you for your reply. While deleting cookies did not work for me, I noticed a new rerouting today after the login: it now goes via auth0.atlassian.com. This now works (after allowing Javascript for that particular page)! So I and may team can login again with Firefox. Thank you.
- I am glad it is/was NOT necessary to deactivate adblocker or cookie restrictions.

Ven V · Answer

Thanks for your quick reply. I didn't want to clear the cookies and site datas but just did that after your suggestion and it did the magic! Thanks for the help.

Nic Brough -Adaptavist- · Answer

The question has to be what the difference is between your Firefox set up and someone else's (one that, like mine, is working fine).

Latest version + no add-ons is a good start, but what else have you customised or set up?  Cookie/ad blocking, do not track me, etc