Migrate to manifest V3

[newbe36524]

In the Chrome extension store, there is a notice that "Simply migrate to Manifest V3 and enjoy faster auditing services and new APIs and features."

details: https://developer.chrome.com/docs/extensions/mv3/intro/mv3-migration/

[mingyaulee]

You can absolutely implement manifest v3 for your extension, currently there is a validation of the manifest version in the build process but it will be removed soon. Things to be aware of are

• it is not a standard across browsers (standardisation is underway)
• the APIs may differ in different browsers (Firefox's implementation is still under development)
• the browser polyfill does not support the new APIs yet (issue)
• Background page is deprecated in manifest v3 in favour of service worker, which we can't load Blazor at the moment because Blazor needs a root component to render. In addition, it would have a bad performance impact of we were to use Blazor in service worker because of the lifecycle (where service workers are loaded when needed and unloaded in maximum of 5 minutes)

To workaround the limitations of

1. APIs not available in the browser polyfill - use JS interop to call to the APIs directly
2. Service worker - implement service worker fully in JavaScript

[newbe36524]

It is nice of you to reply to my question, I think there is nothing that needs to be done by this framework but left a link in README.md to indicate this issue.
You can close this as you wish.

[mingyaulee]

Yeah absolutely, I will add a section in the readme for manifest v3.

[newbe36524]

it is about to end of life about manifest v2 https://developer.chrome.com/docs/extensions/mv3/mv2-sunset/

[mingyaulee]

Yes, unfortunately there is still a lot of work that needs to be done before Blazor can be used in MV3 extensions.

At least 2 issues in Chromium that I am aware of:

• Support loading wasm in extensions manifest v3
• implement extension service worker

Standardization of web extensions are still underway and it will take some time to get implemented in all the browsers.