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Add to SafariWhen comparing Puppeteer vs Firefox Developer Tools, the Slant community recommends Firefox Developer Tools for most people. In the question“What are the best test automation tools for web apps?” Firefox Developer Tools is ranked 8th while Puppeteer is ranked 10th. The most important reason people chose Firefox Developer Tools is:
Particularly strong with inspecting the new CSS Grid layouts.
Specs
Question Ranking
Pros
Pro Works great with modern node.js features
Pro Runs a real browser
Unlike the other options here, this is a real browser, just without the GUI parts. This means the quality of the test is much higher, and lets you do things like save to PDF or images.
Pro Actively developed and promoted by Google
Pro Complete API for Chromium included
Chromium tests depend on the same API that Puppeteer gives you access to, so all the features are included
Pro Page inspector
Particularly strong with inspecting the new CSS Grid layouts.
Pro Effective for identifying CSS styles in use on an element and testing different styles
Identifying the font in use is one thing Firefox's Developer Tools panel does particularly well, and which Chrome's Developer Tools panel doesn't do.
Pro Debugger
Debugger is useful and informative.
Cons
Con Not good for Cross Browser Tests
Since it only tests via Chromium, it won't help you test inconsistencies between browsers like Edge or Safari. There are projects to get around this, but they aren't mature.
