I've always wanted to use this (and enabled it on all my sites, e.g. www.stavros.io), but it has never worked for me, I can always see the alt-svc header in the

I've always wanted to use this (and enabled it on all my sites, e.g. www.stavros.io), but it has never worked for me, I can always see the alt-svc header in the response (using TBB 9.0).