design-reviews#1164: Incubation: PWA (same-site) Origin Migration

#1164: Incubation: PWA (same-site) Origin Migration

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Opened Oct 30, 2025

Explainer

https://github.com/WICG/manifest-incubations/blob/gh-pages/pwa-migration-explainer.md

The explainer

Includes the information requested by the Explainer Explainer.
Follows the Web Platform Design Principles.
Includes or links to answers to the Security/Privacy Questionnaire.
Describes user research you did to validate the problem and/or design.

Where and by whom is the work is being done?

GitHub repo: https://github.com/WICG/manifest-incubations
Primary contacts:
- Marijn Kruisselbrink (@mkruisselbrink), Google
- Daniel Murphy (@dmurph), Google
Organization/project driving the design: Google Chrome
This work is being funded by: Google
Incubation and standards groups that have discussed the design:
- WICG (https://github.com/WICG/manifest-incubations/pull/121)
Standards group(s) that you expect to discuss and/or adopt this work when it's ready: WebApps WG

Feedback so far

Multi-stakeholder feedback:
- Chromium comments: prototyping/implementing https://chromestatus.com/feature/5123349239955456
- Mozilla comments: https://github.com/mozilla/standards-positions/issues/1313
- WebKit comments: https://github.com/WebKit/standards-positions/issues/568
- There is some positive feedback from developers in the chromium implementation bug
Major unresolved issues with or opposition to this design:

You should also know that...

No response

Track conversations at https://tag-github-bot.w3.org/gh/w3ctag/design-reviews/1164

Discussions

Discussed Dec 1, 2025 (See Github)

Christian: the proposal may be out of date. they may want to do cross-origin handshakes.

Lola: We need an updated explainer, if so.

I'll comment and ask.

Yves: My concerns were mitigated by the fact that it was same-sites only. they were making an assertion on behalf of other resources. So if they've changed, i'm concerned. It's better to clarify if it has changed.

Hadley: I agree.

Comment by @lolaodelola Dec 4, 2025 (See Github)

Hi @mkruisselbrink,

We've heard that there may have been changes to this proposal, should we wait for you to update this proposal with new explainer and details?

Comment by @mkruisselbrink Dec 4, 2025 (See Github)

Thanks for asking, I updated the explainer a couple of days ago to take into account some feedback we got from our web platform security team. I am not currently aware of any other changes that we might want to make, so it should be good to look at.