Greg Fairbanks

https://github.com/puppeteer/puppeteer/blob/f2e19276acb80e596ff5c781c9ae2bc2f2a8f363/src/node/BrowserFetcher.ts#L608-L611 In our setup, the download url is https, and the proxy url is http. This line chooses whether to use the http or https module based on the protocol...

Actually it looks like this is a bug in https-proxy-agent https://github.com/TooTallNate/node-https-proxy-agent/issues/126