The title says it all: I am wondering whether it is possible to interact with the Firefox [https://developer.mozilla.org/en-US/docs/Tools/Web_Console console] upon starting Firefox in [https://developer.mozilla.org/en-US/docs/Mozilla/Firefox/Headless_mode headless mode]. More generally, I'd settle for some way of accessing it programmatically, in scripts. '''What I've tried:''' So far I've been playing with the [https://www.npmjs.com/package/selenium-webdriver Javascript bindings] to [https://github.com/SeleniumHQ Selenium] without success: Starting Firefox with the [https://developer.mozilla.org/en-US/docs/Mozilla/Command_Line_Options -devtools option] from Selenium does opn the dev tools, but I then [https://github.com/SeleniumHQ/selenium/issues/8665 cannot] send key combinations that will switch me to the actual console, or in fact interact from my `.js` script with the open devtools window in any way.