Bill McCloskey writes:

> # Silence ++THIS and --THAT
> export MOZ_QUIET=1
>
> # Silence NS_WARNING
> export MOZ_IGNORE_WARNINGS=1
>
> then you won't get any more messages about DOM windows or
> docshell creation/destruction or about NS_WARNINGs firing.

Thanks very much, Bill.  I think I'll also find this useful.

Can we all agree to only use NS_WARNING for things that are
unlikely to happen?

This includes NS_ENSURE_SUCCESS and friends.
I thought there was almost consensus on avoiding NS_ENSURE_*
because of the way jump statements are hidden, but I've still seen
some advocating.

Can we at least agree not to use NS_ENSURE_SUCCESS when failure
is reasonably likely in normal use?
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