HTML5 added a whole bunch of useful new values for the rel attribute, one of which is noreferrer (yes, spelt correctly this time). When this attribute is added, the browser is instructed not to set the header if the user follows the link. Support for this was first added to WebKit (Chrome/Safari) way back in 2009, arrived in Firefox in late 2014 and most recently was added to Microsoft Edge (but is not supported in any version of Internet Explorer).
Interesting, I was not aware of this attribute. It’s a shame about Internet Explorer’s lack of support as I could have used it as a replacement for the Unbubble derefer service that I’ve been using.
I’m looking forward to a time when IE is nothing but a distant memory.