ambi
Ambi lets you execute any function ambidextrously; providing you the ability to execute any function (be it synchronous, asynchronous, returns, callbacks, promises) as if it returned a promise.
webext-polyfill-kinda
Super-lightweight Promised wrapper around `chrome.*` API to be used in modules. Prefer `webextension-polyfill` if you’re using it directly in an extension.
fse
fs: then-ified, extended, and dependency-free