How to Disable a Website Blocker
Web browsers, such as Internet Explorer and Mozilla Firefox, offer website blockers to give you an option to block certain websites from other users. You may use it to block inappropriate content at work or an academic institution. Parents find this feature very useful since they can block adult websites from their kids. However, as an administrator, you have the option to disable a website blocker. This can be very helpful if you find certain useful sites being blocked accidentally on your Web browser.
Internet Explorer users
Open "Internet Explorer" from the Start menu.
Click on the "Tools" tab on your top bar and select "Internet Options." Hit the "Security" tab.
Clear the check mark next to "Enable Protected Mode (requires restarting Internet Explorer)."
Hit the "Sites" button under "Restricted sites." Make sure there are no websites listed in the "Websites" box. If you find any, single-click on it and click on the "Remove" button.
Click on "Apply" and hit "OK." Restart "Internet Explorer."
Mozilla Firefox users
Launch Mozilla Firefox from the Start menu.
Click on "Tools" and select "Add-ons..."
Click on the "Preferences" button next to the add-on "BlockSite."
Clear the check mark next to "Blacklist" and "Enable BlockSite." This will disable the "BlockSite" add-on.
Click on "OK" and restart Mozilla Firefox.