UXP (Pale Moon, Basilisk, etc) not working anymore

[EchedelleLR]

Describe the bug Since several releases ago, at least several months or 1 year ago, an Hydrogen update left any UXP-based browser including Pale Moon, Basilisk and others without support.

The interface just loads an empty page with neither error nor warning in console.

To Reproduce Steps to reproduce the behavior:

1. Open DevTools
2. Change to console
3. Go to https://hydrogen.element.io
4. Wait

Expected behavior Interface loading and at least some error being thrown or just get it working.

Screenshots

Desktop (please complete the following information):

• OS: Devuan 4 Chimaera and Debian 11 Bullseye
• Browser: Pale Moon 31.2.0.1 and Basilisk
• Version: Hydrogen version 0.3.0, 0.3.1 and 0.3.2 as far as I could get recently (I didn't record the error back then)

Additional context

• Since about a several months or 1 year ago.
• Having the AdBlock extension enabled or disabled doesn't change the behavior.

[EchedelleLR]

The solution goes by implementing Vite Legacy official plugin as showed at https://github.com/vitejs/vite/tree/main/packages/plugin-legacy.

It is focused in web browsers not supporting some basic features and, as Vite suggests, their defaults require these ones supported in the browser.

This goes in favor of Hydrogen supporting legacy web browsers as claimed.

I made a recent work at https://github.com/mwmbl/front-end/pull/30