If you have a library that will return non operational error, just remove it from your project. If your code throws when it is not expected to, fix it.
This is like saying put a `try/catch(ignore)` everywhere. Seriously.
The goal isn't to leave errors in, its to expose them when something changes to make them happen so that you can do the 2 things above.
In any case, logging error gives you no information anyway. Just try running: `console.log(new Error("..."))`. So at the very least you should do `catch(function(e){console.log(e.stack);})`
So if you're ever trying to debug promises in a non-Chrome browser, you may find my "insane" advice pretty helpful. :)