A more significant problem is that my MFP does a blue-screen freeze when started from a "Webview"-based browser such Lightning, Hermit, the default Android browser and many others.
I wanted to stop running my MFP when this happens to explain the problem to the browser user. In JavaScript, Webview should be detected by searching for ";wv" in variable navigator.userAgent. However, this did not work. A quick Google search indicated that I instead had to detect this on the SERVER SIDE using PHP.
So, I tried to insert detection code into my audio.php file. The detection worked but I still got the blue-screen freeze with Webview-based browsers. To get around this problem (successfully), I renamed by index.html to index.php and then inserted the following PHP code at the top.
<?php $wv = $_SERVER["HTTP_X_REQUESTED_WITH"];
if(strlen($wv) > 0) {
echo "<H2>[ ",$wv," ] - incompatible Android 'Webview' browser.</H2>";
echo "<H3>For Android, we recommend Brave, Chrome, or Firefox.<br><br>";
echo "[ <a href='/'>Return to 1-dot.com homepage</a> ]</H3>\r\n\n";
exit();
}
?>