I was affected when they blocked non-major browsers. In my case, KDE's Falkon. The workaround that worked for me was to log in first with another account that

I was affected when they blocked non-major browsers. In my case, KDE's Falkon. The workaround that worked for me was to log in first with another account that didn't had 2FA (my uni's gmail account, at university they use Google services) and then add my other account - with the downside that I could not make it the main account anylonger, as now Google doesn't let you sign out on a per-account basis but from all accounts at once.