"One thing i noticed when creating the PoC:"

You mentioned in your medium article:

** "One thing i noticed when creating the PoC:**

worker.port.addEventListener('message', me.onMessage.bind(me), false);

does not work, while you can use addEventListener() on a non shared worker. Might be worth a ticket. This change solved it:

worker.port.onmessage = me.onWorkerMessage.bind(me);

From Mozilla:

We have to call port.start(); inside the onconnect event handler at the end if we want to use addEventListener to add a listener to the message event instead of assigning an event handler to onmessage .