Login to website thropugh shell script
 

I want to automatically take the user id and the password of website through my script.
Actually when we open the site a authentication window will pop-up for the credentials. I have tried to supple the credentials through script but vain.
here is code:
firefox -url http//www.***.com
curl http://username:password@***.com/url

it is able to open the website which DON'T need any logins say google. But for some site which needs it is failing.
It is just stopping at that pop-up window for credentials.

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