Big changes Chromium 81.0.4044.0 (r737027) Puppeteer can now fetch a Firefox Nightly binary for you via PUPPETEER_PRODUCT=firefox npm install. Also, there’s now an example showing how to launch Firefox with Puppeteer. File uploads are generally more reliable (#5363) and elementHandle.uploadFile(...filePaths) now triggers a change event, matching the old behavior in Puppeteer v1.20.0. (#5389) Node.