PWA not installable (in Firefox) on https://helth.app

[Dilden]

Firefox for Android console shows: Fetch event handlers must be added during the worker script’s initial evaluation.

Related issues:

• https://github.com/GoogleChrome/workbox/issues/2448
• https://github.com/surma/rollup-plugin-off-main-thread/issues/24
• https://bugzilla.mozilla.org/show_bug.cgi?id=1629125

The PWA installs just fine with Chrome for Android and Chrome for desktop.