I have 2 questions:

* I've builded a selenium webdriver script that works right but he opens a new instance of Firefox. Is it possible to use a Firefox that is already open? If it's yes, how?
* I need to send informations to the site, to keep my session active. I've thinking to use cookie and sending a request every 10 minutes. I don't know if it's a good idea...(I can't use selenium authentification, because the site generate a table with numbers like for bank site)

If anyone could give me some support...