The other applets are likely to show an extra dialog, with the message: "Allow access to the following application from this web site?". The Workflow applet displays the dialog when the applet starts, the Viewer and the 3D Viewer shows when exiting the applet.
When confronted with this warning, the user can just click the Allow button. If the user does not want to see the warning again, he \ she should check the "Do not show this again for this app and web site" check box before clicking the Allow button. This can safely be done.