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A forbidden response header name is an HTTP header name that cannot be modified programmatically. Mozilla (stylized as moz://a) is a free software community founded in 1998 by members of Netscape. Forbidden response header names can be used to refer to a specific request or response type. The header name has been used in this article as a reference to the forbidden response name. For example: 'Set-Cookie-2' and 'Forbidden-response-header-name'