Ohh interesting! But now I'm confused about the email I was replying to,
which seemed to suggest that the lack of continuity was intentional, due to
a "footgun"?

On Tue, 28 Apr 2026 at 14:32, Barry Pollard <[email protected]> wrote:

> This looks like a regression introduced in Chrome 146 due to some
> unrelated work on bfcache. I've raised
> https://issues.chromium.org/issues/507358432 for this.
>
> On the plus side the new `extendedLifetime: true` option does reintroduce
> this functionality for sites happy to use this :-)
>
> But we should fix that regression so it also works for same-origin
> navigations for workers without that option. And ideally introduce a WPT to
> catch this next time (I couldn't see an exiting one that is broken in
> stable
> <https://wpt.fyi/results/workers/shared-worker-options-mismatch.html?label=stable&label=master&aligned>
> and working in experimental
> <https://wpt.fyi/results/workers?label=master&label=experimental&aligned>)
> to ensure continued interop as you say.
>
> On Tuesday, April 28, 2026 at 1:01:17 PM UTC+1 [email protected] wrote:
>
>> On Tuesday, 31 March 2026 at 11:47:41 UTC+1 [email protected] wrote:
>>
>> Let me share the summary of origin trials as Yoav asked:
>>
>> Currently, 35 sites, including large and medium-scale origins,
>> participated in the origin trials. Usage metrics can be found at
>> https://chromestatus.com/metrics/feature/timeline/popularity/5550.
>>
>> Developers expressed strong interest in using this feature to maintain a
>> SharedWorker's lifetime across same-origin navigations within a single tab.
>> While there were requests for seamless migration from non-extended to
>> extended lifetime workers, we identified a potential "footgun" regarding
>> WebLocks where a long-lived worker could hold a lock indefinitely. To
>> ensure safety, we decided to enforce strict separation between the two
>> lifetime modes.
>>
>> Does this mean Chrome has no intention of implementing the spec'd
>> behaviour
>> <https://html.spec.whatwg.org/multipage/workers.html#between-loads-shared-worker-timeout>
>> here? Both Firefox and Safari maintain a single shared worker across
>> navigations. It would be nice to have some interop here.
>>
>> Demo: https://random-stuff.jakearchibald.com/shared-worker-navigation/
>> (the number is the same every navigation in Firefox and Safari, but not in
>> Chrome, since the worker is re-created each time).
>>
>> Jake.
>>
>>

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