The main concept is for bypassing this firewall block service we can use VPN application .But problem again come that due lack of administrative privilege the Installation and Download option is blocked and this again decrease the hope to bypass the firewall.
Many of the company use morzilla firefox as a web browser.if in your company or industry have the same than you can aslo free you blocked website by installing a simple add-one .
After Installing the VPN Add-one you have to switch on it and here you will start using the all website with out getting blocked.
The VPN you have to download is Zenmate Security & Privacy VPN.
See the images How to use the VPN