Official Windows Build · v0.1.60 Beta

Get the AI-Native Browser for Windows

LastBrowser combines ultra-fast performance with Sidekick, ConPTY terminal, Widevine DRM L3, and isolated Spaces. Local-first on your PC.

Download count is currently unavailable.
v0.1.60: Published October 26, 2026. Current GitHub release assets; SHA-256 checksums below.
Setup: 337,225,568 bytes · Portable: 336,870,880 bytes.
v0.1.59: Published October 22, 2026. The installer is now significantly smaller (~300 MB instead of ~610 MB) as model files are no longer bundled. Setup and Portable are signed with a Certum certificate; checksums see below (SHA-256).
Setup: 300,020,200 bytes · Portable: 299,666,496 bytes.
v0.1.58: Published October 17, 2026. Beta update subscription with a notice about unsigned daily builds; release pipeline for the daily beta and stable channels; desktop build fix with pinned Python runtime dependencies for Sidekick. Setup and Portable are Authenticode-signed (Certum); checksums see SHA256SUMS.
Setup: 640,207,744 bytes · Portable: 639,845,984 bytes.
v0.1.47 TEST · separate signed prerelease: For testing only; not a stable release and does not change the v0.1.60 update channel. Download TEST Setup (174,778,024 bytes) · Download TEST Portable (174,415,880 bytes)
Setup SHA-256: 7affb53fb25d9dde379b367805aca6a60e5ce614676918262d276a892e7caef0
Portable SHA-256: 0a8d82bfe4d144b5e426a7d1b1fc802779f2ab3ccd6f2e586bfc2fa98d8e6b52
VM, provider, and two-profile acceptance remain open; not Store-certified.
⬇️ Download for Windows (v0.1.60 Beta .exe) (321.60 MB) Portable Edition (.exe)

Free & Local-first · No Account Required · Windows 10 & 11 (64-Bit)

🛡️ View Windows SmartScreen instructions
Standard Installer (Recommended)

Setup Installer (.exe)

Recommended for everyday browsing and productivity on Windows 10 & 11.

  • ✓ Automatic background updates on new release builds
  • ✓ Default Windows browser registration (HTTP/HTTPS)
  • ✓ Start menu and desktop shortcuts
  • ✓ Silent deployment for sysadmins: Lastbrowser-0.1.60-x64-setup.exe /S
Download Lastbrowser-0.1.60-x64-setup.exe (321.60 MB)
SHA-256 Checksum (Setup) · 337,225,568 bytes 
d3d9b4a34b067bf84ef11f10db24efb3392313e8b5385a8fc006d0eb6c27b83e
Portable Edition (Zero Registry)

Portable Version (.exe)

Zero installation needed. Ideal for USB flash drives and restricted environments.

  • ✓ Requires no administrator privileges
  • ✓ Leaves zero footprint in the Windows Registry
  • ✓ Runs directly from USB sticks or network drives
  • ✓ Complete self-contained data directory
Download Lastbrowser-0.1.60-x64-portable.exe (321.27 MB)
SHA-256 Checksum (Portable) · 336,870,880 bytes 
3375cade2970287134bd383d37ebd2f466d041305c837ae846f80ac1a140c03e
Linux · Preview

AppImage (x64)

A single file that runs without installation. Linux (x64) preview.

  • ✓ No installation and no root privileges needed
  • ✓ One image file, ready to run
Download AppImage (v0.1.60)

File: Lastbrowser-0.1.60-x86_64.AppImage · 322,068,456 bytes
SHA-256: 48ef924f9f40bfb44db81cb1c3b0ac8e6ff82101b1622ceb4e6b9e930c56b8b9

Start on Linux 
chmod +x Lastbrowser-0.1.60-x86_64.AppImage && ./Lastbrowser-0.1.60-x86_64.AppImage
Linux · Preview

tar.gz (x64)

Archive for manual installation or your own scripts (Linux x64, preview).

  • ✓ Extract and run directly
  • ✓ No root privileges needed; place it in any folder
Download tar.gz (v0.1.60)

File: Lastbrowser-0.1.60-x64.tar.gz · 367,874,879 bytes
SHA-256: e99ac3c9f416b0d8dd1634738f2d563ead3bc91b352dd8b825518d585edd11ae

In progress (Apple Silicon & Intel)

macOS – Coming soon

A version for Macs with Apple Silicon and Intel processors is in development. No download is available yet.

Beta 0.1.57-demo.4 · Preview, not the stable release · Windows Setup · Linux AppImage

Verify Checksum in PowerShell

Execute the following command in PowerShell to verify the cryptographic hash:

Get-FileHash -Algorithm SHA256 .\Lastbrowser-0.1.60-x64-setup.exe
🛡️

Clean & Virus-Scanned

Verify the SHA-256 checksum and digital signature of the downloaded file.

Check the file yourself ↗

Ready in 3 Simple Steps

Seamless and transparent onboarding on any Windows 10 & 11 desktop.

1

Run the Installer

Download the installer and run it. If SmartScreen appears on brand-new builds, click "More info" -> "Run anyway".

2

Pick AI Personality

Choose your Sidekick Assistant mindset (Pragmatic, Research, or Engineer) and optionally configure your BYOK keys.

3

Browse Productively

Enjoy ConPTY terminal, isolated Spaces, 48 agentic skills, and Castlabs Widevine streaming from minute one.

LastBrowser
LastBrowser v0.1.60 Beta Windows 10 & 11 (64-Bit) · Local-first
Download (.exe) (321.60 MB)