How do I set network.http.sendRefererHeader?

I want to ensure that my web server passes the header when passing from https site to another https site.  Found articles that state the networ.http.sendRefererHeader can be set to 1 to send the header, but I don't know how or even where to set it.
mbartAsked:
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mbartConnect With a Mentor Author Commented:
This is a client side Firefox solution.
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