This release brings Kokua to parity with LL 6.6.4 and additional ports over a Firestorm/Singularity feature which allows the avatar to move by holding down the left button on the avatar along with the right button and then steering with the mouse.

LL actually released 6.6.4 twice see https://releasenotes.secondlife.com/viewer/6.6.4.575022.html and https://releasenotes.secondlife.com/viewer/6.6.4.574885.html for the content.

Release notes - Kokua - Version Kokua 6.6.4

New Feature

KKA-955 FS Port: Two mouse button avatar movement

Task

KKA-954 Perform merge from LL Viewer 6.6.4 (Maintenance Izarra + Hotfix DRTVWR-544)