Promise polyfill overriding problem

[slawwan]

I have unexpected for me behavior in Firefox 55.0.2 64bit

I've found similar issue #264 and explanations in #191 and I saw other issues and discussions
So it is a problem not only for me

I understand that main aim of overriding existing Promise is to fix its bugs.
But there is a problem if some code, in my example native code, works with native Promise
So when I work with fetch, all chain of then it is a chain of native Promise, not overridden, and it is produce other bugs and problems and it is not obvious. It means that polyfill does not fix problems of native implementation.

Maybe this functionality should be optional?
Or it may be better to abandon this functionality?

[zloirock]

It's a duplicate of #178, see my answer: #178 (comment)

[zloirock]

Seems you propose something like #283, so I'll close it.