proxy working

[jiten jha]

Dear friends
                   I just want to know that when ever i using free proxy then my inter net not working and even any sites also not open. then how can i open block site and why my sites are not open. I am using fire fox . How can i open Block sites . 
And why we use free proxy . what is the need of free proxy .
if use free proxy then how it work and when i m using free proxy then why my inter net not working.





      
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