Encountered a system error in C# Selenium with Firefox, as the expected browser binary location was missing and unable to be found in the default location

I am attempting to utilize Selenium with C# and encountering the following error message:

System.InvalidOperationException: 'Expected browser binary location, however unable to locate binary in default location. No 'moz:firefoxOptions.binary' capability provided, and no binary flag set on the command line (SessionNotCreated)'

Any ideas on what might be causing this issue?

Answer №1

This specific error notification...

System.InvalidOperationException: 'Expected location of browser binary, but failed to locate it in the default path. No 'moz:firefoxOptions.binary' capability provided, and no binary flag set on the command line (SessionNotCreated)'

...suggests that the GeckoDriver encountered issues in starting a new Browsing Context, specifically a Firefox Browser session.

Possibly the browser is not located in the usual directory, causing access problems for the GeckoDriver to find the firefox binary.


Solution

To resolve this problem, provide the exact path of the firefox.exe binary using the BrowserExecutableLocation parameter within the FirefoxOptions class as shown below:

FirefoxOptions options = new FirefoxOptions();
options.BrowserExecutableLocation = ("C:\\Program Files\\Mozilla Firefox\\firefox.exe"); //location where Firefox is installed
WebDriver driver = new FirefoxDriver(options);

Answer №2

To access the website, you're required to first download Mozilla Firefox

After downloading, proceed to install Mozilla Firefox.

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