What is Clecko?
Clecko is the fork of Gecko used in Classilla. Mozilla ended official Mac OS 9 support with 1.2, although versions through 1.3.1 would still generally build if the patches for OS X (the old Fizzilla build) were removed. Because Mozilla 1.4 and up include so much OS X specific code that won’t work with the CarbonLib available for Mac OS 9, the decision was made to split Gecko off at 1.3.1 (using the Gecko that was maintained in the venerable old WaMCom build) and backport later changes to it rather than use the Mozilla code base directly, which won’t build. This version of Gecko thus has a significantly different lineage despite having a common ancestor, and while its sources are similar, its provenance and feature set are therefore necessarily different. To avoid confusion with the main Gecko, even though this forked Gecko is still mostly official Mozilla code, Classilla’s version of Gecko was renamed Clecko.