fix(install): respect environment proxy config when downloading Firef… (#6577)

Issues: #6573

docs/api.md

@@ -463,7 +463,7 @@ You will then need to call [`puppeteer.connect([options])`](#puppeteerconnectopt
 Puppeteer looks for certain [environment variables](https://en.wikipedia.org/wiki/Environment_variable) to aid its operations.
 If Puppeteer doesn't find them in the environment during the installation step, a lowercased variant of these variables will be used from the [npm config](https://docs.npmjs.com/cli/config).
 
-- `HTTP_PROXY`, `HTTPS_PROXY`, `NO_PROXY` - defines HTTP proxy settings that are used to download and run Chromium.
+- `HTTP_PROXY`, `HTTPS_PROXY`, `NO_PROXY` - defines HTTP proxy settings that are used to download and run the browser.
 - `PUPPETEER_SKIP_CHROMIUM_DOWNLOAD` - do not download bundled Chromium during installation step.
 - `PUPPETEER_DOWNLOAD_HOST` - overwrite URL prefix that is used to download Chromium. Note: this includes protocol and might even include path prefix. Defaults to `https://storage.googleapis.com`.
 - `PUPPETEER_DOWNLOAD_PATH` - overwrite the path for the downloads folder. Defaults to `<root>/.local-chromium`, where `<root>` is Puppeteer's package root.

src/node/install.ts

@@ -15,11 +15,16 @@
  */
 
 import os from 'os';
-import https from 'https';
+import https, { RequestOptions } from 'https';
 import ProgressBar from 'progress';
+import URL from 'url';
 import puppeteer from '../node.js';
 import { PUPPETEER_REVISIONS } from '../revisions.js';
 import { PuppeteerNode } from './Puppeteer.js';
+import createHttpsProxyAgent, {
+  HttpsProxyAgentOptions,
+} from 'https-proxy-agent';
+import { getProxyForUrl } from 'proxy-from-env';
 
 const supportedProducts = {
   chrome: 'Chromium',
@@ -148,16 +153,32 @@ export async function downloadBrowser(): Promise<void> {
   }
 
   function getFirefoxNightlyVersion() {
-    const firefoxVersions =
+    const firefoxVersionsUrl =
       'https://product-details.mozilla.org/1.0/firefox_versions.json';
 
+    const proxyURL = getProxyForUrl(firefoxVersionsUrl);
+
+    const requestOptions: RequestOptions = {};
+
+    if (proxyURL) {
+      const parsedProxyURL = URL.parse(proxyURL);
+
+      const proxyOptions = {
+        ...parsedProxyURL,
+        secureProxy: parsedProxyURL.protocol === 'https:',
+      } as HttpsProxyAgentOptions;
+
+      requestOptions.agent = createHttpsProxyAgent(proxyOptions);
+      requestOptions.rejectUnauthorized = false;
+    }
+
     const promise = new Promise((resolve, reject) => {
       let data = '';
       logPolitely(
-        `Requesting latest Firefox Nightly version from ${firefoxVersions}`
+        `Requesting latest Firefox Nightly version from ${firefoxVersionsUrl}`
       );
       https
-        .get(firefoxVersions, (r) => {
+        .get(firefoxVersionsUrl, requestOptions, (r) => {
           if (r.statusCode >= 400)
             return reject(new Error(`Got status code ${r.statusCode}`));
           r.on('data', (chunk) => {