The js files are are licensed under the MPL 2.0.
The HTML, CSS and images files are copyright to midassoft.

noVNC is Copyright (C) 2018 The noVNC Authors
(./AUTHORS)

The noVNC core library files are licensed under the MPL 2.0 (Mozilla
Public License 2.0). The noVNC core library is composed of the
Javascript code necessary for full noVNC operation. This includes (but
is not limited to):

    core/**/*.js
    app/*.js
    test/playback.js

Or alternatively the license texts may be found here:
http://www.mozilla.org/MPL/2.0/
https://github.com/novnc/noVNC