[Sargos]

I'm not sure what you mean by not worrying about iOS needing OS updates for browser upgrades as the Safari engine is the only web browser engine allowed on iOS and third party browsers like Chrome are just skins on top of Safari and not real counterparts to their desktop cousins. Upgrading the OS is the only way to get new web functionality and bug fixes.

[fulafel]

Does the browsee limitation come from loading non reviewed code and interpreting it? Are other browsers allowed if they don't implement JavaScript?

[Sargos]

I think that would be allowed, yes. It would be a rather useless web browser though so that's probably why nobody has tried before.

[ericmay]

Web browsers have to use the Safari engine but that doesn't mean they don't also separately update the browsers and add functionality. I.e. you mostly get modularity by not using Safari even if you have to rely on the underlying Safari engine being updated. Most of the features users notice are updated by the app provider anyway.