Help?!?

I use a old iBook G4 for schoolwork on Google Drive. It was going great until "Google Drive wants a new browser. Time to modernize! it wont let me download chrome or any other supported browser because I atleast need 10.6 snow leopoard but I have 10.5.8 leopard. My two browsers, Camino and Safari both say the time to modernise thing. Any help? I need this laptop for schoolwork please. D: