The error Firefox is already running usually indicates that you must remove lock files before you can launch Firefox. For convenience, we offer tools to clean out these lock files from your RCE session.

To resolve this problem:

• If you are working inside the HMDC RCE click the Applications menu, select RCE Utilities, and then choose Clear Firefox Locks or Clear Thunderbird Locks. Then, try launching Firefox or Thunderbird again.
• If you are not working inside the HMDC RCE, type the following command on a command line to delete the Firefox lockfiles:
  

  rm -f ~/.mozilla/firefox/*.default/{lock,.parentlock}

For more information, please see http://kb.mozillazine.org/Profile_in_use or contact us.