Clarify browser vendor positions on APIs in MV3

[oliverdunk]

There are a few API's that I'd love to know each browser vendor's thoughts on:

• The MV3 storage.session API recently introduced by Chrome: https://bugs.chromium.org/p/chromium/issues/detail?id=1185226
• Cross-extension messaging (runtime.onMessageExternal) in MV3 extensions

Opening this issue with both so I can suggest these for the agenda.

[zombie]

We plan to implement the storage.session API, for similar reason, though we will likely use the (now standard) structured clone algorithm for both ergonomic and performance reasons (IMO it's pure win compared to JSON).

I'm not aware of any changes related to runtime.onMessageExternal for MV3, you would need to ask a more specific question.

[zombie]

(also nit: keeping issues focused on one topic makes it easier to triage, discuss and eventually resolve)

[oliverdunk]

I'm not aware of any changes related to runtime.onMessageExternal for MV3

Ok, I think that's all we need for now to be honest. I just wanted to make sure it wasn't going away.

(also nit: keeping issues focused on one topic makes it easier to triage, discuss and eventually resolve)

Totally fair! I can break things like this down slightly further in the future.

Thanks for replying here.

[oliverdunk]

Notes from the 2022-01-20 meeting:

• [oliver] Is storage.session API going to be adopted by other browsers? Saw comments about structured cloning, can that be used to store non-JSON data?
• [tomislav] API is going to be the same. Structured cloning may be an option.
• [rob] We haven't started on implementation yet, but broadly it makes sense to have a consistent object serialization format across storage apis
• [jessie] (on behalf of Apple) Policy to not talk about unreleased APIs. The currently released MV3 API in Safari doesn't have storage.session.
• [oliver] cross-extension messaging: will runtime.sendMessage to message other extensions continue to be supported?
• [simeon] On Chrome this API should continue to work as expected. If it doesn't, that's a bug and we should fix it.
• [rob] On Firefox side, no plans to remove it either.
• [jessie] In Safari this API is not implemented.

With that in mind I'm going to close this issue, since I mostly opened to have a link for the agenda.