It's worth noting that Chrome has plans to deprecate header-based pins in a few months and static pins (the ones baked into binaries) at some point after their

It's worth noting that Chrome has plans to deprecate header-based pins in a few months and static pins (the ones baked into binaries) at some point after their Certificate Transparency policy covers all non-expired certificates. That'll make Firefox the only mainstream browser with HPKP support. (Mozilla hasn't announced their intentions so far.)