@skysmith , Welcome to Microsoft Q&A, based on my test, I reproduced your problem. I also could not use the following code to open chrome with specific URL.
Based on my further research, you could try the following code to open the website with another browser:
Process process = new Process();
process.StartInfo.UseShellExecute = true;
process.StartInfo.FileName = "chrome";
process.StartInfo.Arguments = "www.google.com";
process.Start();
Best Regards.
Jack
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