Sometimes it is useful to call firefox with some URLs, maybe for business or maximizing the traffic purpose, or some else. Here's the code, you can make it as a BAT file by copy it into notepad and then save it as .BAT file.
"C:\Program Files\Mozilla Firefox\firefox.exe" www.google.com www.gmail.com www.yahoo.com http://nazmy88.blogspot.com
The code above is an example to call firefox and it automatically opens google, gmail, yahoo, and my blog. After you edit and make it as a .BAT file, for example named as OPEN.BAT, just with one click it opens those URLs.