How to Enable and Customize Facebook Login Notification FeatureFollow the steps given below to enable the notifications for every login to your facebook account from the new devices (which you have never used in the past to access facebook).
Step 1: Enabling Notifications for logins from New DevicesIn the top right portion of your Facebook profile page or homepage you can see three tabs namely Home, Profile, Account. Click on the Account tab and then click on the Account Settings in the drop down menu (see the screenshot below)
After clicking on the Account Settings tab you will land up on a page where you can customize your account settings by changing your name, username, email etc. Scroll down the page you’re on, click on the second last option of Account Security.
Here you can enable notifications for logins to your facebook account from new devices. Click on Yes and then hit the Submit button. This will enable Login notifications for your facebook account.
Step 2: Facebook Computer RegistrationNow Logout your facebook account and then login again. Just after login you will see a page prompting you to register your computer.
Name your computer whatever you want and also specify whether you want Facebook to remember the computer being registered or not. For public computers make sure you leave this box unchecked and for personal computers it should be checked.
Similarly you can register other computers or mobile devices too by following the same procedure mention above. For managing your registered computers, go to Account (in top right corner of facebook homepage) >> Account Settings >> Account Security.
Now for any login to your facebook account from an unregistered computer, facebook will send you notifications via email or SMS.
Note: If you will clear your browser cookies for any reason after registering a computer then you would have to register it again.