I can't get Firefox to open on my computer. I've been using it for a year and a half with no problems until now. I keep getting the following "Unresponsive script" error message: Script: resource:///components/nsHandlerService.js:432 How do I fix this?

see http://kb.mozillazine.org/Unresponsive_Script_Warning

Try to delete the mimeTypes.rdf file in the Firefox Profile Folder. * http://kb.mozillazine.org/mimeTypes.rdf * http://kb.mozillazine.org/File_types_and_download_actions#Resetting_download_actions You can use this button to go to the Firefox profile folder: *Help > Troubleshooting Information > Profile Directory: Open Containing Folder