Quote:

You can change the network.http.sendRefererHeader key to 0 to disable it, is that what you meant?


The Web Developer extension gives you a handy button for controlling this.

But I haven't "caught it in the act" - I haven't proven there's an image that loads with referrers off. Referrers are needed for some web sites.
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"If they can't picture me with a knife, forcing them to strip in an alley, I don't want any part of it. It's humiliating." - windsock