[BUG] GM_download doesn't work in Firefox on mobile

Sequence of actions:

1. Install

// ==UserScript==
// @name GM_download test
// @match https://example.com/*
// @grant GM_download
// ==/UserScript==

GM_download("https://example.com", "GM_download test");

1. Open https://example.com/

Problem:

Download is not initiated

Expected result:

Download is initiated

Devtools console contents:

Environment:

• OS: Android 17
• Browser: Waterfox (mobile/for Android) 1.2.6
• Violentmonkey Version: 2.49.0