FirefoxOptionsAddArgument Method WebDriver
Adds an argument to be used in launching the Firefox browser.

Namespace: OpenQA.Selenium.Firefox
Assembly: WebDriver (in WebDriver.dll) Version: 3.1.0
Syntax

public void AddArgument(
	string argumentName
)

Parameters

argumentName
Type: SystemString
The argument to add.
Remarks

Arguments must be preceeded by two dashes ("--").
See Also

Reference