For those who cannot finish meeting in Mozilla Firefox here the solution
1- We need to go to Tools and then Options
2- Then we need to go to Privacy and then remove individual cookies
3- Then we must remove the cookies and then close the tab
4- After we have to give to the OK button and we will have finished meeting in OFW
5- Then we are going to Login and we have to be disconnected
Note: Only works for earlier versions of Mozilla Firefox 5
Greetings!
Design-OFW