Issue 1490528: Shared Workers being duplicated

[uazo]

@PF4Public can you test with ungoogled?

1. Visit https://cors-communication-a.glitch.me/ in one tab
2. Visit https://cors-communication-b.glitch.me/ in another
3. Click 'Initialize worker' in both iframes
4. Click 'send message' in one of the two tabs

since he says that brave suffers, which seems strange to me.

    Edge: OK (117.0.2045.55)
    Brave: OK (117.0.5938.153)
    Chrome: NOT OK (118.0.5993.54 - Beta version)
    Chrome: OK (116.0.5845.112)

OK is bad for us.

cromite does not currently have that problem (it duplicates the service worker, like chrome).

[PF4Public]

4. Click 'send message' in one of the two tabs

What is the expected outcome? On A I get messages from A and in B iframe only B. Is it how it is supposed to be?

[uazo]

On A I get messages from A and in B iframe only

yes, I think that is correct. theoretically, the two different sites for eTLD+1 should not be able to communicate each other via the service worker.
it seems strange to me that brave allowed it.

[PF4Public]

Is here a typo?

Brave: OK (117.0.5938.153)
Chrome: NOT OK (118.0.5993.54 - Beta version)

[uazo]

see https://bugs.chromium.org/p/chromium/issues/detail?id=1490528

[PF4Public]

I've tested in 117, It seems I need to test 118 too. I'll let you know.

[PF4Public]

Version 118.0.5993.70 (Official Build, ungoogled-chromium) (64-Bit) Same result. A only sees A, B only sees B.