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Flutter-Web-Wasm Only Loads JS and No Wasm in Firefox #143603

Description

@flowhorn

It seems like the loader doesn't recognize wasm support in firefox .

Steps to reproduce

Open https://flutterweb-wasm.web.app in Firefox Version 120 or later.
Open the Network Console

Expected results

In Chrome you can see the main.dart.wasm and main.dart.mjs loaded. This should also happen in Firefox and happened in previous versions.

Actual results

It loads the main.dart.js as it seems that the loader decided that firefox was not supported for wasm.

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Flutter Doctor output

Not running this locally. Using the latest https://flutterweb-wasm.web.app

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    P2Important issues not at the top of the work listbrowser: firefoxonly manifests in Firefoxe: wasmIssues related to the wasm build of Flutter Web.e: web_skwasmSkwasm rendering backend for webplatform-webWeb applications specificallyteam-webOwned by Web platform teamtriaged-webTriaged by Web platform team

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