Firefox version metadata download should respect HTTPS proxy config

[benelliott]

Steps to reproduce

Tell us about your environment:

• Puppeteer version: 5.4.1
• Platform / OS version: Windows 10
• URLs (if applicable): N/A
• Node.js version: 12.13.0

What steps will reproduce the problem?

Please include code that reproduces the issue.

1. Use Puppeteer via a proxy
2. Provide proxy config via HTTP_PROXY / HTTPS_PROXY env vars and proxy / https-proxy NPM config
3. Set PUPPETEER_PRODUCT=firefox

What is the expected result?

Puppeteer's install.js should use the provided proxy config when downloading Firefox version metadata from https://product-details.mozilla.org/1.0/firefox_versions.json

What happens instead?

Download fails with ECONNREFUSED.

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The problem is that in install.ts, proxy options are configured for the binary data download but not for the Firefox metadata download.

This can be done via the https-proxy-agent package which is already a dependency (used in BrowserFetcher.ts). I'll look at submitting a PR.

[gamma032steam]

For anyone interested, I ended up switching to Playwright in order to work around this.

[stale]

We're marking this issue as unconfirmed because it has not had recent activity and we weren't able to confirm it yet. It will be closed if no further activity occurs within the next 30 days.

[stale]

We are closing this issue. If the issue still persists in the latest version of Puppeteer, please reopen the issue and update the description. We will try our best to accomodate it!