Checking Flathub should give you some idea: https://flathub.org/en/apps/collection/mobile/1 https://flathub.org/en/apps/collection/mobile/1 There are more, not

Checking Flathub should give you some idea: https://flathub.org/en/apps/collection/mobile/1 https://flathub.org/en/apps/collection/mobile/1 There are more, not every application that works fine has metadata filled up (and not everything is on Flathub either). I do use some webapps, but with Epiphany rather than Firefox.