c.ServerApp.browser not updating the default browser


I defined the browser executable file for Jupyter Lab in the jupyter_lab_config.py file as c.ServerApp.browser = u'C:\Program Files\Mozilla Firefox\firefox.exe %s', from forum responses that I have read; however, Jupyter continues to open in the standard browser of my OS. I have closed and restarted the kernel and Jupyter Lab browser numerous times without effect. How can the default Jupyter Lab browser be changed? Could the jupyter_notebook_config.py file conflict with the jupyter_lab_config.py file?

Thank you :slight_smile: