Install the widget by placing this line (You must have jQuery install on your website):

<html>
<head>
</head>
<body>
.
.
.
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script id="free_accessibility_plugin_script" src="https://accessibility.f-static.com/site/free-accessibility-plugin/accessibility.min.js?lan=en&place=bottom-right&distance=50" crossorigin="anonymous"></script>
</body>
</html>

On your bottom of your website HTML before the </BODY> tag.