[Bug]: Calling `chromium.launch` launches the app, but timeouts in the code

[mzpkdev]

Version

1.51.1

Steps to reproduce

1. Clone my repository reproducing this issue https://github.com/mzpkdev/playwright-bug-35596
2. Install Figma desktop app from https://www.figma.com/downloads/ (or possibly any other chromium-based app)
3. Type npm install and run
4. Type npm run test and run
5. You can that while chromium app launches, it timeouts in the code, never reaching the next line of code after await chromium.launch

I've put the same logic of launching the chromium app using puppeteer, and it's not causing any issues
You can try replacing use_playwright with use_puppeteer to compare and check for yourself

Expected behavior

I expect chromium app to launch and the promise of chromium.launch resolve successfully

Actual behavior

I see chromium app launching fine, but the promise of chromium.launch doesn't resolve at all, it gets stuck and timeouts after a while

Additional context

I've been testing this mostly trying to run Figma desktop application, I'm not sure if other chromium apps work fine, but I couldn't make it work with Spotify app too

Environment

System:
    OS: macOS 15.3.2
    CPU: (12) arm64 Apple M4 Pro
    Memory: 1.13 GB / 24.00 GB
  Binaries:
    Node: 22.14.0 - ~/.nvm/versions/node/v22.14.0/bin/node
    Yarn: 1.22.22 - ~/.nvm/versions/node/v22.14.0/bin/yarn
    npm: 10.9.2 - ~/.nvm/versions/node/v22.14.0/bin/npm
  Languages:
    Bash: 5.2.37 - /opt/homebrew/bin/bash
  npmPackages:
    playwright: 1.51.1 => 1.51.1

[pavelfeldman]

Looks like you are running a /Applications/Figma.app/Contents/MacOS/Figma app as a Chromium browser. Playwright assumes it is Chromium and that leads to error. You should simply start your app using spawn, wait for the cdp endpoitn to be printed to its stderr and connect to it via chromium.connectOverCDP.

[mzpkdev]

Hey, thank you for such quick response!

I've just tried to use chromium.connectOverCDP but without much success, it timeouts too with "browserType.connectOverCDP: Timeout 30000ms exceeded."

Call log:
  - <ws preparing> retrieving websocket url from http://localhost:9222
  - <ws connecting> ws://localhost:9222/devtools/browser/646e4195-b13e-4ec7-bb9b-a66b8e3bb74e
  - <ws connected> ws://localhost:9222/devtools/browser/646e4195-b13e-4ec7-bb9b-a66b8e3bb74e

    at use_playwright_connectOverCDP (/Users/mzpk/Workspace/playwright-issue/index.js:37:20)
    at async main (/Users/mzpk/Workspace/playwright-issue/index.js:11:5) {
  name: 'TimeoutError'
}

I've updated the repo with an example playwright-bug-35596/blob/master/index.js#L31

[pavelfeldman]

Maybe Figma does not expose the CDP we can work with. Anyhow this is very much out of scope for Playwright.