Recently there are many questions about the security of Facebook in the world's biggest social site in the event of data theft. In this situation many people are walking on a simple solution named BFF. Although in reality there is no profit writing it on Facebook.
Gujde believes in the comment box really many people are writing BFF. The post is going to be green in the post. Claimed by post, this means the user's account is protected. Recommended to change the password if not green.
image sources
In reality, the user can not open their account information by writing BFF in the comment box.
If you write BFF why is it green? Recently Facebook launched 'Text Delight' feature. The words that are used can be bold and 'colored' by the posting characters.
BFF is a short version of Best Friends Forever-BFF. That is why the writing becomes green when you type it.
It has also been confirmed by Facebook that the user account will be secured when BFF is written - it is not true. Only text animation can be seen when BFF is typed. There is no relation to account security with.