The homescreen engine has always been dodgy — it has different bugs than Safari app, so it seems to be a different version/fork of WebKit. It was always against

The homescreen engine has always been dodgy — it has different bugs than Safari app, so it seems to be a different version/fork of WebKit. It was always against their interest to support this feature too well, so it's probably old and full of tech debt. I believe them when they say it would require a rewrite to work safely in a browser-agnostic way, but that sounds bizarrely like "complying with the law was too much work, so we chose not to". Now they've made all App Store alternatives suck in one way or another, and fragmented between EU and non-EU markets. It's a total mess that just happens to make App Store with Apple's usual fees the best option.