No 100% certain way, I think, but you can see that there are deployment scripts in place and are actively being touched. Combine that with what the cost of doin

No 100% certain way, I think, but you can see that there are deployment scripts in place and are actively being touched. Combine that with what the cost of doing that while instead using an alternative method would be, and the way Mozilla is organised, and you can be pretty confident that it is, IMHO. But here, too, it still holds that that does not give the same level of assurances as self-hosting.