How can I make my Facebook account impossible to log in from a particular device?

[Hieronymus]

1. Without hosts file editing.
2. Without Firefox extension.
3. Without router configuring.

Only via Facebook itself.

[Pulsar]

set it to send you a log in code to your mobile phone.

without entering the code they send you,
you will not get on to the facebook account.

account settings > security > Login Approvals

Login approvals are an extra security feature similar to login notifications,
but with an extra security step. If you turn on login approvals,
you'll be asked to enter a special login code each time you try to access your Facebook account from a new computer or mobile phone.
After you log in, you'll have the option to give that device a name and save it to your account. You won't have to enter a code when you log into any of these unless the cookies are cleared.


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[Md.sagir]

Thats all the open email A/C and Facebook account then longing.