Second Life viewer releases — week #38, 2026: what changed through Sept. 20

# Overview

# Official Linden Lab viewers

• Default viewer: 26.3 — build 26.3.0.31203661088. Status: unchanged during this week. The build is described as offering quality‑of‑life improvements, performance improvements, and bug fixes.

• Second Life Lua Editor (RC/Beta) with Linux support: 26.4.0.34502396632 — promoted September 11. This build introduces Lua scripting support for regions where Lua is enabled, improved communication with the Second Life VS Code extension, an experimental Linux viewer build, updated WebRTC voice, and general viewer maintenance updates.

• Second Life Chat Modernization viewer: 26.3.0.33643480083 — promoted September 4. This build focuses on unifying recent direct message history between mobile and desktop, preserving existing local desktop chat logs, and presenting conversations as a continuous history across platforms.

# Third‑party viewers

# Mobile and other clients No updates were reported for mobile clients or alternative clients during this week.

# Resources and index links The summary references the SL release viewer download page, SL viewer release notes, the Alternate Viewers and Available Viewers index pages, and the Current Viewer Releases page for the most up‑to‑date listing. The blog that publishes these summaries also links to third‑party viewer directories and the Linden Lab TPV Policy.

# What this means for users

For users of third‑party viewers, Kirsten's recent pre‑alpha DX build and Cool VL's experimental build are the most notable touches this week. Third‑party users should consult each project's release notes before upgrading, particularly for pre‑alpha or experimental builds.

# Quick actions

• Desktop users who want stable behaviour can continue on Default viewer 26.3.
• Developers and scripters should try the Lua Editor RC/Beta if they need Lua on supported regions or want VS Code integration testing.
• Third‑party viewer users should read the linked release notes for Kirsten's and Cool VL builds before installing.

# Links mentioned The summary points readers to the official SL release viewer download page, Linden Lab viewer release notes, Alternate Viewers and Available Viewers indexes, the Current Viewer Releases page, and third‑party viewer directories for details and downloads.