I want to run firefox headless.
Not hide the browser window or open it in a virtual desktop, Firefox supports headless mode by using "-headless" flag.
Problem is I know how to do it in chrome but not in Firefox.
My code:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using OpenQA.Selenium;
using OpenQA.Selenium.Firefox;
namespace MyApp {
public partial class Form1: Form {
public Form1() {
InitializeComponent();
}
private void StartBtn_Click(object sender, EventArgs e) {
IWebDriver driver;
FirefoxOptions options = new FirefoxOptions();
options.AddArguments("--headless");
driver = new FirefoxDriver(options);
}
}
}
My WinForm application only has a button with name StartBtn. On clicking of the button Firefox should run headless, but it opens in a normal window.
Update I updated firefox to 56.0.1
Now I get a different error:
An unhandled exception of type 'OpenQA.Selenium.WebDriverException' occurred in WebDriver.dll
Additional information: Expected browser binary location, but unable to find binary in default location, no 'moz:firefoxOptions.binary' capability provided, and no binary flag set on the command line
Headless mode in Firefox is supported from version 56 on Windows and Mac OS. Ensure that you have the correct version installed.
https://developer.mozilla.org/en-US/Firefox/Headless_mode#Browser_support
With Firefox v56.0.1, Selenium.WebDriver v3.6.0 and geckodriver v0.19.0 (x64) this works correctly for me.
Regarding the error:
An unhandled exception of type 'OpenQA.Selenium.WebDriverException' occurred in WebDriver.dll
Ensure you're using the correct version of geckodriver
. I suspect you're using the x32
build on an x64
machine, get the x64
build.