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Unable to log in to Firefox Sync. New machine and new Firefox install.
Log in accepts email and password, then sends authorization code, but when code is entered screen refreshes to display "Incorrect password" and strangely changes the correct email address to an old address that has never been associated with this brand new MacBook Pro.
Note: the old email address was previously used with my Firefox Sync account years ago, but was changed.
Same result replicated several times.
I remain logged in on other devices. Only the new MacBook Pro has this issue.