The voting client is an Isolated Web App so that it can take advantage of the Controlled Frame API to act exactly like a regular browser. You must use Chrome to install and use it.
Enable the flags "Enable Isolated Web Apps", "Enable Isolated Web App Developer Mode", and potentially "Enable Controlled Frame".
Go to "chrome://web-app-internals".
Install this webpage as an Isolated Web App by typing in this page's URL as the "Dev Mode Proxy URL".
The UI below (the vote viewer) requires an admin token with access to Blazer. The voting client can be used by anyone.