> > I'm not really sure - maybe Max knows? > I know we vary on an `optin` cookie - maybe that will provide some clues? >
Christian's response (below) tells us the "mf-m" key in the X-Analytics header has the information we need here. So we're all set. "a" means alpha site and "b" means beta. [From Christian]: > For X-Analytics stuff, > > https://wikitech.wikimedia.org/wiki/X-Analytics > would be the go-to place. I guess you're after the “mf-m” key > there. That key is not set in varnish, but is set in the backend > (MobileFrontendExtension), and it is still getting logged. But I am > not aware of any reports still using that key. Thanks Christian, sorry I didn't read the obvious documentation before dumping vague memories for awesome volunteers to help with. >
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