To use Puppeteer with Firefox, install the puppeteer package and set its product option to “firefox”. This change was made in collaboration with the Puppeteer maintainers, and allows many existing Puppeteer tests to run in Firefox with only minimal configuration changes. Puppeteer itself now offers experimental support for Firefox, based on our CDP implementation.
Puppeteer is a Node.js library that provides an intuitive async browser-automation API on top of CDP. The remainder of this post will look at the details of how to use Firefox with CDP-based tools.
To that end, we have shipped an experimental implementation of parts of CDP in Firefox Nightly, specifically targeting the use cases of end-to-end testing using Google’s Puppeteer, and the CDP-based features of Selenium 4.įor users looking to use CDP tooling with stable releases of Firefox, we are currently going through the process to enable the feature on release channels and we hope to make this available as soon as possible. However, that process will take time, and we want more developers to be able to run their automated tests in Firefox today. It’s clear that WebDriver needs to grow to meet the capabilities of DevTools-based automation. Although there are benefits to WebDriver’s HTTP-based approach, we know there are many developers who find the additional functionality and ergonomics of CDP-based test tools compelling. In our previous blog post about the web testing ecosystem, we described the tradeoffs involved in automating the browser via the HTTP-based WebDriver standard versus DevTools protocols such as Chrome DevTools Protocol (CDP).
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