I made my Angular-Webapp ready for Add 2 Homescreen via https://developers.google.com/web/fundamentals/app-install-banners/
Now its perfectly working on Chrome, but not in Firefox. I am registering on the callback 'beforeinstallprompt' but it's just not firing. In Chrome I got a 100% score on PWA-Audit.
I also dont see that Firefox would require anything more than Chrome: https://developer.mozilla.org/en-US/docs/Web/Apps/Progressive/Add_to_home_screen#How_do_you_make_an_app_A2HS-ready
What am I missing? You can also check out the page: https://beta.donite.de
Firefox doesn't support it yet check the compatibility table @ https://developer.mozilla.org/en-US/docs/Web/API/BeforeInstallPromptEvent , However they keep same code block from chrome to may be support in future check below: https://developer.mozilla.org/en-US/docs/Web/Apps/Progressive/Add_to_home_screen#How_do_you_make_an_app_A2HS-ready
But as of writing this answer it doesn't support it.