hi, this internal error number will only mean something to the webadmins running the server of your bank's website. so please contact the support department of your bank about this first. otherwise you can find some general troubleshooting steps in firefox for websites not working right in [[Websites look wrong or appear differently than they should|this article]].

Create a new profile as a test to check if your current profile is causing the problem. See "Creating a profile": *https://support.mozilla.org/kb/profile-manager-create-and-remove-firefox-profiles *http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Profile_issues If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over problems. *http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox ---- Boot the computer in Windows Safe mode with network support (press F8 on the boot screen) as a test to see if that helps. *http://www.bleepingcomputer.com/tutorials/how-to-start-windows-in-safe-mode/