Ask HN: What do you use to facilitate creating browser extensions?

Hi, I'm building a web extension for social media automation and I try to find tools/platforms to get my product quicker to marketplaces like Chrome, Firefox, Safari, IE extension galleries.

In particular, I am looking for a tool/platform that would help me gather stats from the extension galleries, payments and deployment.

There are partial solutions for this. Like https://www.npmjs.com/package/chrome-webstore-upload that I could connect with CircleCI to get my extension to Chrome gallery, or https://github.com/mozilla/webextension-polyfill to make my extension compatible with FF and Chrome.

Edit: There is also https://github.com/EmailThis/extension-boilerplate but only as a starter. Nothing like CRA for extensions.