TFA seems to say that Chrome and others don't yet do it like Firefox does. If this really turns out to be an advantage watch the others copying the reverse-engineered code. I assume you could look it up in the Firefox repo now?
I think it's very likely Firefox want everybody to copy them. This is a fight best fought with everyone against Windows, and it's no particular skin off Firefox's nose if Chrome is also easy to use: since Chrome is basically the default non-Edge browser, everybody choosing Firefox is already aware of Chrome and has decided against it.
