[iBook] Clamshell Browser???

[Pat]

I bought a clamshell for a friend and set it up for her.  She's a total 
computer illiterate and intends to leave it alone completely.  I have 
her running OS 9.1 with Outlook Express and Internet Explorer and would 
like to change the browser to a more current one without making it any 
harder than I have to for her to get comfortable on it.  She's had 
perfect service on the machine and I see no reason to update her any 
other way.  What can I download for her to run on that system?

Pat