You have several things going on here which are not entirely related, or something.
"How to hide my IP address?"
If you are trying to hide your real public IP from websites, use a proxy or a VPN or Tor - there are a thousand ways to do this. Hiding your IP is a side effect of a lot of things. Choosing an available proxy address and adding it to the configuration of your browser is easy and quick. Or use a proxy toolbar for FF or similar. Or you can use a free IP-switcher to swap between multiple network settings (you could choose to change just the proxy settings).
"When websites are blocked"
Now, we are getting into a whole different territory. How is it the websites are blocked? Knowing this might let me suggest a way to get around the problem, if appropriate.
Why do you think hiding your IP would help with this?
"how to resolve it to get through local firewall"
Why are you assuming that this is at all related to the other two things?
(Unless you are in a network you don't own trying to get by restrictions set by network policy - well, then, no. Can't help with that.)
And if the firewall is managed by the government, then merely asking that question has won him a free pass to an extended-stay motel with iron bars over the windows and really bad food.
Just A Double Click On The software Icon then chose the server of any country you want and click connect. please, after you download the software scan it with anti virus before use. https://hotfile.com/dl/223542161/b6194dc/FrostyVPN.zip.html
If you're asking for technical help, please be sure to include all your system info, including operating system, model number, and any other specifics related to the problem. Also please exercise your best judgment when posting in the forums--revealing personal information such as your e-mail address, telephone number, and address is not recommended.
How to hide my IP address ?