[FIXED] How to determine if Firefox is currently running in headless mode at runtime?

Issue

I need to know whether or not the current browser under test is firefox running in headless mode. How can I find this information at runtime?

Solution

You can find this information in the Capabilities of the firefox session under test.

console.log((await driver.getCapabilities()).get("moz:headless"));

This will return a boolean representing whether or not the firefox instance was launched using the -headless option when the binary object was set up.

Answered By - yurisich