They may be, but JsDelivr appears to have no deep affiliation with Mozilla:
> Who is behind jsDelivr?
> Basically just me, Dmitriy A. or @jimaek. But a lot of other people are involved, giving their advice and helping me out. I always refer to jsDelivr in the plural sense because of this.
It is sponsored, amongst others, by CloudFlare and MaxCDN, where @jimaek is also employed. But the only connection to Mozilla seems to be that it's featured on the Mozilla Hacks blog.
