[kensoh]

Puppeteer automates headless / visible Chrome today. However, the foundational way it does this is through DevTools Protocol. I believe it might be browser agnostic in time to come. There are various (some successful, some failed) adapters for bridging DevTools Protocol to IE, Edge, Firefox, Safari etc. So I really do think supporting cross-browsers is not an impossibility.

But resonated with your point that there are just so much codebase / automation assets already written. Usually exploring new tools happens when a new project happens, rather than recoding entirely an existing project. For the existing code base, unless contributors from the community writes a parser to translate those to Puppeteer API?