There is no way to make SwiftKit use anything other than Internet Explorer. The Default Browser setting inside SwiftKit will only changed what happens when you click on links to external sites, enabling it will cause the links to open in your default browser (be that chrome or what ever browser you use), Disabling it will cause links to open with the Swift Broswer, A lite weight browser designed for quick access to RuneScape related content. If you are unable to load Runescape it is most likely because you installed Java with chrome. When you install Java with Chrome or FireFox they both Sandbox the installation So that way Java Applets can only be access by their own processes, this is most like for security purposes. So to solve this you need to install Java using Internet Explorer, this will then give SwiftKit access to load Java, Because SwiftKit uses the same internet and security settings as Internet explorer.