cannot login in any google service
Hello there, two days ago the Google Calendar Widget inside the Gmail page stopped working in my Firefox Dev (version 88.0b2). I ignored that because I could continue to send and receive mails and I was thinkin it was a google server problem. Today I cleared cache and cookies to make a clean start, just to try if that could restore the Calendar Widget. Of course I did know that would have logged me out. Now it's impossible to log in in any Google Service because the login pagin is stuck right after I enter my email address! The console output shows warnings and a CORS error, as you can see in the screenshot. My browser is localized in italian, but the errors should be comprehensible anyway.
I can log in without problems with Chrome, but not with Firefox.
What's happening? My Firefox Dev version is bugged?