Mercury is a privacy focused service that you can download locally and run on any device with a browser. This keeps extensions like GoGuardian, Cisco Umbrella, and ContentKeeper from being able to peep on this site due to them not being able to access file and about:blank urls.
Go to the releases, and download the latest version currently up. If GitHub is blocked for you, please refer to the Alternative Download Links section.
Go to your files, go to downloads, right click if you're using a mouse or click with two fingers if you're using a trackpad, the click "Extract All..."
Open the unzipped folder and then click on the launcher.html
file.