A cross-posting from K-Meleon forum (since their forum connection is a bit strange at the moment): Re: Using the Goanna engine instead of Gecko in K-Meleon... Posted by: roytam1 Date: November 28, 2017 11:59PM With applying mozilla.patch by hand over palemoon git rev 6bb8c4459(with my XP patch set), and some hacks over generated goanna include files, a test binary is built.  https://o.rths.cf/gpc/files1.rt/km76-goanna341-bin.7z Drop contents of lav.7z in where k-meleon.exe lives