Thanks @gazumped, for the reminder about ad-blockers blocking Evernote cookies.
Hi @Ornot, I had the same difficulty until I made the following cookie-related changes in Firefox v57.0.4:
- Told my ad-blocker (uBlock Origin) to ignore/no longer check on evernote.com [Note: I am unsure whether this is strictly necessary, but this is my current setting].
- in Firefox > Options > search for "cookies", then set the following:
* History: Use Custom settings
* Accept cookies from websites
* Accept third-party cookies: Never
* Exceptions: Add "https://evernote.