FFmpeg won't load with Angular 18 #830

Describe the bug
I'm using Angular 18 with FFmpeg.wasm v0.12.15 and FFmpeg-core multi threaded v0.12.9 and when i call the load method, the browser create a thread and import the worker file but it never ends loading. I added a console log to the worker and i only receive one message:

Received message 
Object { id: 0, type: "LOAD", data: {…} }
​ ► data: Object { coreURL: "blob:http://localhost:4200/498bf81a-beb0-4f8a-8381-b4206e3c3643", wasmURL: "blob:http://localhost:4200/49505f87-6669-47b9-a5bc-4f59f6651503" }
​ ► id: 0
​​ ► type: "LOAD"
​​ ► <prototype>: Object { … }

It looks like the message is not handled by the worker because the worker use the cmd attribute and receive a message with a type attribute

To Reproduce

export class AppComponent {
    private ffmpeg : FFmpeg | undefined;
    private loaded : boolean = false;

    constructor() {
        this.loadFFmpeg();
    }

    private async loadFFmpeg() {
        this.ffmpeg = new FFmpeg();

        try {
            const assetsFolder = '/assets/ffmpeg/';
            await this.ffmpeg.load({
                coreURL: await toBlobURL(`${assetsFolder}ffmpeg-core.js`, "text/javascript"),
                wasmURL: await toBlobURL(`${assetsFolder}ffmpeg-core.wasm`, "wasm"),
                classWorkerURL: await toBlobURL(`${assetsFolder}ffmpeg-core.worker.js`, "text/javascript"),
            });

            console.log('FFmpeg loaded successfully');
        } catch (error) {
            console.error('Error loading FFmpeg:', error);
        }

        this._loaded = true;
    }
}

Here no console.log are displayed

Expected behavior
Just to display any of the console log, a little preference to the first one but a step is a step.

Screenshots

Desktop (please complete the following information):

• OS: Ubuntu 24.04 (64-bit)
• Browser Firefox
• Version 134.02

Smartphone (please complete the following information):
/

Additional context
I surely don't have the best way to do it neither really understand the message. Please correct me if i'm wrong !