How to Fix Selenium's 'The path to the driver executable must be set by the webdriver.gecko.driver system property' Error?

Selenium using Java - The path to the driver executable must be set by the webdriver.gecko.driver system property

Problem:

When attempting to launch Mozilla Firefox using Selenium, you encounter the error message: "The path to the driver executable must be set by the webdriver.gecko.driver system property."

Cause:

This error occurs when Selenium is unable to locate the GeckoDriver executable, which is required to control and interact with Firefox. By default, Selenium will search for the GeckoDriver in the system PATH. However, if the GeckoDriver is not present in the PATH, or if the path is incorrect, Selenium will fail to launch Firefox.

Solution:

To resolve this issue, you need to add the directory containing the GeckoDriver executable to your system PATH.

On Unix systems:

export PATH=$PATH:/path/to/geckodriver

On Windows systems:

Update the Path system variable to include the full directory path to the executable.

Alternatively, you can set the webdriver.gecko.driver system property directly:

System.setProperty("webdriver.gecko.driver", "path/to/geckodriver.exe");

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