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Selenium vs Playwright vs Puppeteer (2026): Differences, When to Use Each and How to Choose
The 60-second answer
| Your situation | Likely fit |
|---|---|
| You need the widest browser coverage and many language bindings, built on a W3C standard | Selenium |
| You want auto-waiting, a test runner and tracing, across Chromium, Firefox and WebKit | Playwright |
| You write Node.js scripts to control Chrome or Firefox | Puppeteer |
| You want to drive a browser that is already running, such as a browser profile | Any of the three |
Side by side
| Selenium | Playwright | Puppeteer | |
|---|---|---|---|
| What it is | WebDriver, a W3C Recommendation, with language bindings | A browser automation and test framework | A JavaScript library for controlling a browser |
| Languages | Several bindings, including Java, Python, C#, Ruby and JavaScript | Node.js, Python, Java and .NET | JavaScript |
| Browsers, as documented | Chrome, Edge, Firefox, Safari and Internet Explorer | Chromium, WebKit and Firefox on Windows, Linux and macOS | Chrome and Firefox |
| Protocols | W3C WebDriver, and WebDriver BiDi | Its own protocol, and CDP when attaching | DevTools Protocol or WebDriver BiDi |
| Built-in waiting and tooling | Explicit and implicit waits | Auto-waiting, test runner, trace viewer, UI mode, reports | A library: you add your own test runner |
| Attach to a running browser | debuggerAddress capability | connectOverCDP, Chromium only, lower fidelity | connect with browserWSEndpoint or browserURL |
How do you choose in three questions?
- Which language does your team use? Puppeteer is JavaScript only. Playwright covers Node.js, Python, Java and .NET. Selenium has bindings for the widest range.
- Which browsers must you cover? If Safari or Internet Explorer matters, Selenium lists them. If you need WebKit and Firefox alongside Chromium in one framework, Playwright lists all three.
- Do you want a test runner and tracing included? Playwright ships with them; with Selenium and Puppeteer you assemble your own.
Attaching to a browser that is already running
This is the pattern you need to drive an existing browser profile. The profile's browser exposes a debugging address, and your tool attaches to it instead of launching a new browser:
| Tool | How it attaches |
|---|---|
| Selenium | Set the debuggerAddress capability to a host:port, for example 127.0.0.1:38947 |
| Puppeteer | puppeteer.connect({ browserWSEndpoint }); the default viewport is 800×600, so pass defaultViewport: null to keep the window size |
| Playwright | chromium.connect_over_cdp(...); Chromium-based browsers only |
See the full walkthrough with working code in Control browser profiles with a local API.
Typical projects and a sensible pick
| Project | A sensible pick |
|---|---|
| Regression tests for a web app, run in CI across several browsers | Playwright or Selenium |
| A Node.js script that checks pages and takes screenshots on a schedule | Puppeteer or Playwright |
| A Python team that already uses Selenium | Keep Selenium unless a missing feature hurts |
| Driving an existing browser profile from Python | Selenium or Playwright, attaching to the running browser |
| Driving an existing browser profile from Node.js | Puppeteer or Playwright, attaching to the running browser |
Common mistakes
- Fixed sleeps instead of waits. They slow tests and still fail on a slow day.
- Creating a new context when attaching. You lose the profile's cookies and login. Reuse the existing context and tab.
- Mismatched driver versions. Selenium needs a driver that matches the browser's major version.
- Installing the full Puppeteer package when you only attach.
puppeteer-coreis the library without a bundled browser. - Choosing by popularity. Pick by your language, your browsers and your test needs.
Where ADSSPEED fits
ADSSPEED's local API opens a browser profile and returns the addresses that Selenium, Puppeteer and Playwright attach to, so your script runs inside the profile with its own cookies, login and proxy. If you would rather not write code, the no-code recorder builds replayable scripts for you; see no-code record and replay automation. Use automation only for accounts you own or are authorised to manage, and follow each platform's rules.
Frequently asked questions
Which is better: Selenium, Playwright or Puppeteer?
None is better in general. Selenium suits teams that need many languages and the broadest browser coverage, Playwright suits modern test suites that want auto-waiting and tracing, and Puppeteer suits Node.js scripts that control Chrome or Firefox. Match the tool to your language and browsers.
Is Puppeteer only for Chrome?
Its documentation says it controls Chrome or Firefox over the DevTools Protocol or WebDriver BiDi. It is a JavaScript library and runs headless by default.
Which languages does Playwright support?
According to its documentation, Node.js, Python, Java and .NET. It supports Chromium, WebKit and Firefox on Windows, Linux and macOS.
Can I attach these tools to a browser that is already running?
Yes. Selenium uses the debuggerAddress capability, Puppeteer connects with browserWSEndpoint or browserURL, and Playwright uses connectOverCDP, which works only with Chromium-based browsers and has lower fidelity than its own protocol connection.
Which should I use with browser profiles from an antidetect browser?
Any of the three, as long as the profile's browser exposes a debugging address. Pick by your language, then follow the guide for attaching to the profile's running browser.
Sources
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