Sound in p5.js gives warnings

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Cannot Create Classes

AFAIK, Firefox-based browsers treat the file:// URL scheme the same way as the http:// URL scheme. Thus far I haven’t found any issues at all when running Processing sketches on Firefox under its file:// URL scheme. Firefox-based browsers use the Gecko Spidermonkey JS engine. But if we prefer/need to test JS on the Chrome’s Blink V8 engine instead, we can use the Vivaldi browser: Similarly to Firefox, Vivaldi doesn’t restrict the file:// …