Explain why the compilation may fail and show a message to the user

[gqio]

• Service worker can't be loaded on Firefox (private browsing and when users have Delete cookies and site data when Firefox is closed checked, sites can not register a Service Worker.)
• Safari is blocking wasm (due to memory limit allocation)
• Broadcast channel failed to initialize

[georges-gomes]

This is important...
And reporting it to Mixpanel to know what kind of issue is happening and in which proportions.