Setting product programmatically in puppeteer.launch supersedes this environment variable. This can also be used during installation to fetch the recommended browser binary.

PUPPETEER_PRODUCT - specify which browser you'd like Puppeteer to use.

PUPPETEER_EXECUTABLE_PATH - specify an executable path to be used in puppeteer.launch.See puppeteer.launch on how executable path is inferred. PUPPETEER_CHROMIUM_REVISION - specify a certain version of Chromium you'd like Puppeteer to use.Defaults to /.local-chromium, where is Puppeteer's package root. PUPPETEER_DOWNLOAD_PATH - overwrite the path for the downloads folder.Note: this includes protocol and might even include path prefix. PUPPETEER_DOWNLOAD_HOST - overwrite URL prefix that is used to download Chromium.PUPPETEER_TMP_DIR - defines the directory to be used by Puppeteer for creating temporary files.PUPPETEER_SKIP_CHROMIUM_DOWNLOAD - do not download bundled Chromium during installation step.HTTP_PROXY, HTTPS_PROXY, NO_PROXY - defines HTTP proxy settings that are used to download and run the browser.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. Puppeteer looks for certain environment variables to aid its operations. For a version of Puppeteer purely for connection, see puppeteer-core. It translates the Selenium commands and forwards them to the Marionette driver.When you install Puppeteer, it downloads a recent version of Chromium (~170MB Mac, ~282MB Linux, ~280MB Win) that is guaranteed to work with the API (customizable through Environment Variables). The Gecko driver (previously named wires) is an application server implementing the Selenium/WebDriver protocol.

This driver has it’s own protocol which is not directly compatible with the Selenium/WebDriver protocol.

Marionette is the new driver that is shipped/included with Firefox. In addition to performing actions on the browser, Marionette can also read the properties and attributes of the DOM. menus and functions) or the content (the webpage loaded inside the browsing context), giving a high level of control and ability to replicate user actions. It can remotely control either the UI or the internal JavaScript of a Gecko platform, such as Firefox. Marionette is an automation driver for Mozilla’s Gecko engine. But what is Marionette? What Mozilla says about it?

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