

I have no idea exactly what that means.
But Apple provides extensions for most functionalities, but, as you mentioned, they’re more limited because Apple used to require that extension developers register a $100 per year account in order to develop extensions.
They don’t do this anymore, but it was a big reason why Safari got held back, especially in the beginning of the browser wars.
Because “the church” only ever attract megalomaniacal fantasists who are prone to abuse their power.