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Showing content from https://github.com/microsoft/playwright/issues/36650 below:

1.54.0 breaks downloading browsers when an HTTP(S) proxy is used · Issue #36650 · microsoft/playwright · GitHub

1.54.0

How to reproduce:

1. npm install playwright@1.54.0
2. https_proxy=http://localhost:3128 npx playwright install webkit

The browser is downloaded and placed in the cache folder.

When https_proxy is set to http://<domain>:<port> then an attempt to run npx playwright install webkit to download browsers will fail with

TypeError [ERR_INVALID_PROTOCOL]: Protocol "https:" not supported. Expected "http:"
    at new ClientRequest (node:_http_client:190:11)
    at Object.request (node:http:102:10)
    at httpRequest (/Users/user/Projects/playwright-proxy-test/node_modules/playwright-core/lib/server/utils/network.js:80:139)
    at downloadFile (/Users/user/Projects/playwright-proxy-test/node_modules/playwright-core/lib/server/registry/oopDownloadBrowserMain.js:45:34)
    at main (/Users/user/Projects/playwright-proxy-test/node_modules/playwright-core/lib/server/registry/oopDownloadBrowserMain.js:96:9)
    at process.<anonymous> (/Users/user/Projects/playwright-proxy-test/node_modules/playwright-core/lib/server/registry/oopDownloadBrowserMain.js:110:13)
    at process.emit (node:events:518:28)
    at emit (node:internal/child_process:949:14)
    at process.processTicksAndRejections (node:internal/process/task_queues:91:21) {
  code: 'ERR_INVALID_PROTOCOL'
}

It works for 1.53.2 and previous versions. One can run a squid proxy using Docker via docker run --rm -p 3128:3128 ubuntu/squid:5.2-22.04_beta and then test that browsers are downloaded successfully.

System:
    OS: macOS 15.5
    CPU: (14) arm64 Apple M4 Pro
    Memory: 303.50 MB / 48.00 GB
  Binaries:
    Node: 22.17.0 - ~/Opt/node-v22.17.0-darwin-arm64/bin/node
    npm: 10.9.2 - ~/Opt/node-v22.17.0-darwin-arm64/bin/npm
  Languages:
    Bash: 3.2.57 - /bin/bash
  npmPackages:
    playwright: ^1.54.0 => 1.54.0

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