[warning] mutating the [[Prototype]] of an object will cause your code to run very slowly

[Escaroda]

I don't use this package directly (and can't find where it comes from in my system) but I'm always getting this annoying warning in firefox console

mutating the [[Prototype]] of an object will cause your code to run very slowly; 
instead create the object with the correct initial [[Prototype]] value using Object.create

and peace of code:

[Escaroda]

I've found out that it's from mongol package (and I don't need it in production) but anyway. Is this warning ok?

[Richard]

This is a common warning that is raised only by Firefox, when replacing the prototype of an object, there's nothing that can be done about it, except not do that, but then the Meteor.users collection will not work properly.