This is correct. Per App Store rules, all web browsers are basically just skins on top of WebKit. Not only can they not make extensions work like they can on

This is correct. Per App Store rules, all web browsers are basically just skins on top of WebKit. Not only can they not make extensions work like they can on other OSs, they also can't make their own HTML/CSS or JS engines. See 2.5.6 here - https://developer.apple.com/app-store/review/guidelines/ https://developer.apple.com/app-store/review/guidelines/ Android has Firefox with many extensions, and Firefox variants such as Tor browser. iOS essentially has Safari or skinned Safari. (This may all change when they're forced via anti-trust rulings to allow 3rd party apps & stores on their devices, but those legal rulings may be years off).