Thunderbird cannot connect to Comcast. I need to update my comcast password but cannot find instructions on how to do that

If you want to change your password, you need to do it on the Comcast web site. Once you have done that, you can update Thunderbird with the newly acquired password this way: - Make sure cookies are allowed (<Settings | Privacy & Security | Web Content | Accept cookies from sites>); - Delete all cookies for that account (<Settings | Privacy & Security | Web Content | Show Cookies>); - Delete all passwords for that account from saved passwords (<Settings | Privacy & Security | Passwords | Saved Passwords>); Now restart Thunderbird. You will be asked for your new credentials.