I just updated Firefox to Firefox Quantum 57.0 64 bits and Gmail doesn't work, it shows this error:
Gmail requires cookies to be enabled
Cookies seem to be disabled in your browser. Gmail requires cookies to be enabled in order to operate.
To use Gmail, enable cookies by changing your browser's Preferences or Options. If you have a third-party cookie manager, you will have to configure it to allow cookies from Gmail.
After enabling cookies, try again.
But this really doesn't make any sense, because cookie configuration is the same as before, it worked before the update. Other Google services as Calendar or Hangouts work fine.
Things I've tried:
- Cleaning cookies.
- Clearing Firefox cache.
- Try Private Window, same problem.
- Try Edge and Chrome, both work.
- Check extensions, they are all disabled because they are not compatible with the new version, except Adblock Plus and Privacy Badger (but I disabled them and the problem persisted).
UPDATE: Ok, I just noticed something funny is happening with cookies, because Reddit keeps showing the cookie alert even after I agree.