Can't login using Firefox

I can't log in on any of ETC pages (forum, learning, etc) since some days ago using firefox browser (version 91.0.2).
I am using Safari andit works fine.
Any idea why this is happening?
MacBook Pro 2,5 GHz Quad-Core Intel Core i7

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  • Nothing seems to have worked. I've cleared cookies and cache a couple times. I also specifically went to forums and etcconnect and used the developer tools to delete cookies and cache. I've uninstalled and reinstalled firefox. I've used the firefox refresh function. I've logged out of my firefox account and then tried logging in to the forums/myetc. 

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