Classilla

Classilla is a Gecko-based Internet suite for PowerPC-based classic Macintosh operating systems, essentially an updated descendant of the defunct Mozilla Application Suite by way of the Mac OS port maintained in the aborted WaMCom project. The name is a portmanteau of Classic (the classic Mac OS, as defined by the Classic Environment), and Mozilla.

Like the Suite it is descended from, Classilla offers E-mail (POP/SMTP), Usenet (NNTP), Gopher, FTP and World Wide Web (HTTP) access, using a modified version of the Gecko layout engine called Clecko. Classilla also includes its own versions of the DOM Inspector, Mozilla Composer and Venkman components; the former IRC ChatZilla component was removed in version 9.1. Classilla was the last updated major browser for classic Mac OS systems, and the only Mozilla-based browser for that environment most recently in maintenance as well, as iCab 3's final update was 3.0.5 in January 2008, Opera's Mac OS 9 support ended with version 6.03 on 20 August 2003, Internet Explorer for Mac on the classic Mac OS ceased development with 5.1.7 in July 2003 and Mozilla itself ceased support in 2002 (see History).

The final version of Classilla was released in March 2021 and the suite is no longer officially supported. The developers considered the project to be alpha quality software. Classilla shared administration with TenFourFox, a fork of Mozilla Firefox for PowerPC-based Macs running Mac OS X Tiger and Mac OS X Leopard. The primary maintainer was Cameron Kaiser.