Fixes Web Firefox: dropping a file onto itself navigates the page

[jeanp413]

This PR fixes #83287

[bpasero]

@jeanp413 thanks, I think this is the right direction, but now thinking more about it, wouldn't the best fix be to prevent default on the workbench container where this event eventually bubbles up? As such I suggest this fix in:

vscode/src/vs/workbench/browser/web.main.ts

Line 90 in 4da5e10

private registerListeners(workbench: Workbench, storageService: BrowserStorageService): void {

// Prevent default navigation on drop
this._register(addDisposableListener(this.domElement, EventType.DROP, (e) => EventHelper.stop(e, true)));

[jeanp413]

Much better. Thanks

[bpasero]

Thanks!