Expose WebNN API to service workers

[zweack]

While WebNN works well within a web app using onnxruntime-web, it fails to work in a browser extension.

Is there any way to use WebNN in a browser extension (background script)? If not, is there a plan to support browser extensions?

[anssiko]

It looks like this request is to expose WebNN API to service workers.

Considering also WebGPU added support for service workers to enable use cases such as WebLLM chrome extension I will label this also as a feature request. Further feedback on use cases and possible implementation considerations are welcome in this issue.