You do not have to download anything in order to view pages using LiveGraphics3D. However, if you want to use LiveGraphics3D on your own, non-commercial web pages, you have to copy a JavaScript package and a Java archive to your web server.
The recommended way to use LiveGraphics3D 1.94 is to install these two files:
In order to download these files you have to click the links above with the right mouse button and save them or with the left mouse button and a key modifier (usually CONTROL) depending on your web browser and platform. (Please consult your web browser's manual if you need more help about this point.)
The documentation explains how to install and use the files live.jar.js and live.jar.
Since very few modern web browsers support Java applets, using the Java archive alone is not recommended. One of the few ways to view Java applets is by using Google Chrome with the CheerpJ Applet Runner extension.
You are also invited to download LiveGraphics3D's logos. Mathematica graphics and notebooks to create them can be found on the pages with examples.