Opera 9.64 is the best you can get… for anyone stuck on a very OLD Mac still running OSX 10.3.9 Panther.
I know that because I had an injury earlier this year that kept me flat on my back for 2 weeks. The challenge was to be productive with nothing more than an iPod Touch & an iBook G3/700, circa 2003. The laptop (which originally shipped with a bootable OS 9) runs too slow to realistically use with Tiger (osx 10.4) so I erased it & installed Panther OSX 10.3, then amused myself by assembling a collection of useful tools to help me be productive and tools that would run under such an old OS.
FireFox 22.214.171.124 will run in Panther, but useless because it can’t properly display most modern websites. (Just forget about watching YouTube on an old computer). Neither did that old version of Safari, but Opera 9 works pretty well, and includes a decent IMAP email client (pop3 client too, but I was using imap). Supposedly, Opera 10 is rated to work with Panther, but that was not my experience. 9.64 is it. BTW, this is when I seriously gave IMAP a try, and for those of you out there with multiple email devices, it works far better than POP3 mail – but your server needs to allow you enough server space to make imap practical.
Other OLD apps I found useful and worked with OSX 10.3.9 Panther:
Adobe Reader 7.08
Chicken of the VNC 2.0b4
Flash Player 9
MS Office 2004
I used 1Password on the iPodTouch, and since DropBox is not supported on such an old OS X 10.3.9 system, ChronoSync can sync a local folder to a network volume that is a dropbox folder on the server. More old Mac apps at;