[seqfan] HELP: "You must have cookies enabled to log in to the OEIS."

[Zak Seidov]

Dear seqfans,
Each time (at least often) I try to enter oeis.org it says: 

You must have cookies enabled to log in to the OEIS.

Then I go to login page and just click "login".
Hot to rid off this?
I guess that I should "enable cookies",
but don't know how to do this:(

Thx and sorry
for silly Q,
Zak

PS I use WIN10/Firefox in case it matters.