Same, shows JavaScript error:

"Uncaught ReferenceError: SharedArrayBuffer is not defined at db48x.js:615:40"

Both in Chrome and Firefox (both are up to date to versions way beyond where SharedArrayBuffer should have been introduced)

I think they should either use ArrayBuffer, or use https instead of http, apparently SharedArrayBuffer has security restrictions

SharedArrayBuffer is necessary to run multiple threads with EmScripten.

It needs https.

Use https://48calc.org/db48x/index.html

Apparently, for security reasons, your server needs to add certain headers if you want to use SharedArrayBuffers.

https://hacks.mozilla.org/2020/07/safely-reviving-shared-mem...

This is done on that page, though on some browsers it requires an explicit page reload. This works with Mozilla 132.0, just tested on Fedora 41.

This works with Firefox 132.0, tested on Fedora 41 right now.