Security & Privacy Architecture
LastBrowser was built from the ground up on the “Local-first by design” principle. All sensitive data stays on your device and is protected by proven Windows security technologies.
1. Multi-process architecture & sandboxing
LastBrowser uses the proven multi-process architecture. Each open web tab runs in a separate, isolated renderer process with strict operating-system sandboxing. Compromised websites can neither access the file system nor other tabs or the ConPTY terminal.
2. Local DPAPI encryption
Sensitive credentials are stored locally in %APPDATA%\Lastbrowser. Storage details depend on the credential type and the configured integration.
3. Zero involuntary telemetry
Unlike conventional browsers, LastBrowser contains no tracking libraries, no Google Analytics scripts and no ad networks. No browsing history, clicks or searches are transmitted in the background. The only outbound communication happens on explicit user action (e.g. checking for new updates via GitHub Releases).
4. Microsoft Store Generative AI Policy 10.2 compliance
To comply with Microsoft Store policies, LastBrowser implements built-in mechanisms for reporting unwanted AI content. Users can flag problematic chat answers at any time via a report form and adjust the copilot mindset.
Responsible disclosure & security contact
If you discover security vulnerabilities in LastBrowser, please report them responsibly directly to our security team:
[email protected]