Re: Updated Firefox and now Incredimail will not open
Alright then, try completely uninstalling Firefox, and then try restarting your computer and installing Firefox 13 again from www.getfirefox.com.
Also, is there a specific reason you are using Incredimail? All my experiences with it seem to be quite bloated, and poor quality. Using another email client such as Windows Live Mail will be a better solution (and you can do backgrounds and emoticons if you want in Windows live too )