Uninstall Excelleris Client Certificate on a Mac computer using Firefox:

  1. Open Firefox.
  2. Select Firefox from the top left corner of the desktop and click Preferences.
  3. Once in the Preferences window, select Advanced, then click the Certificates tab.
  4. Click View Certificates.
  5. In the Certificate Manager dialogue box, click Your Certificates.
  6. Select the certificate that you wish to uninstall, click Delete.
  7. Click OK when prompted to confirm to delete the certificate.