If you still want to surf the Internet with your clamshell using OS9, you will find that many pages can no longer be displayed correctly with old Internet browsers such as Internet Explorer or Netscape due to changed web standards.
A free modern alternative is iCab, which is also available in a classic version.
A small downer: iCab has to be downloaded every 6 months in a new version because a time stamp is built in. The author Alexander Clauss also offers a paid, extended version of the browser.