how do i close the add button on facebook?

[Rosa]

I don't want more people to add me on Facebook. How do i close the add button?
I have seen other profiles where the add button is missing.
I have looked everywhere on the Privacy Settings, or Account Settings, and i cant see any help there.
Can someone please help me?...or tell me how can i contact Facebook?
Thank you.

[Yuuuup]

How do I block or unblock an app?

Blocking an app means it will not be able to access any information about you or send you any requests. If you received a request for an app and you want...
Blocking an app means it will not be able to access any information about you or send you any requests.

1.1.Go to your app request

2.Click the 'x' button next to the request

3.When you see the yellow box, click the block app link


If you have not received a request for an app and you want to block it:

1.Find the app's profile page by entering the app's name in Search

2.Select the result under the Apps heading

3.The result is the app's profile page

4.Click the Block App link in the left column of the page

You can see all your blocked apps in the Blocked People and Apps section of your Privacy Preferences Page.