[coder543]

That is interesting. I just tested it myself, and at least for my setup (Firefox on Mac on ARM), the events only showed up in the dev tools if the server closed the SSE connection... so, maybe Firefox still hasn't fully fixed this problem.

[mmcclimon]

Yeah, that seems to be the case (confirmed with their little example at https://github.com/mdn/dom-examples/tree/master/server-sent-...). Once the connection is closed you can see things, but that's not particularly useful for debugging!