Please use native promises instead if at all possible. Native Promises have been stable in Node.js and browsers for around 6 years now and they have been fast for around 3. Bluebird still offers some useful utility methods and you can use it - but please consider native promises first.
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Currently - it is only recommended to use Bluebird if you need to support old browsers or EoL Node.js or as an intermediate step to use warnings/monitoring to find bugs.
Check List
Feature Request
As the bluebird's readme says:
Others
No response