This is the simplest part of ExtraView installations. A computer with a working network connection and a client browser is the key requirement. See the page here for a list of the browsers that are supported.
If you are using the ExtraView Command Line Interface from a client machine, you will need the ability to run Perl and you must have access to the CLI scripts, either on your own computer or on a shared resource. If you have enabled the ability to use the drag-and-drop interface to upload file attachments, document fields and image fields, then this is controlled by a Java applet. This requires the installation of the Java runtime on each client computer. This is not mandatory but provides the ability to upload files and images more simply.
You should have every user who has been using a previous version of ExtraView clear their browser’s cache before starting a newly installed or newly upgraded version of ExtraView.