The browser project relies on an engine of roughly 245,000 lines of C code, running alongside complementary implementations like the Rust-based Southstar. Security is maintained through process-per-tab sandboxing using tools like Linux Landlock and macOS Seatbelt, paired with non-JIT engines including QuickJS and the WAMR fast interpreter. Across October 2026 Web Platform Tests, the software demonstrated robust standards alignment by passing 91.5% of tested HTML, DOM, and URL subtests. It also features modern conveniences like default WebGPU support, on-device local blocklists, and an opt-in loopback MCP server for local automated agents.
Key points
Sandboxed renderers and the total exclusion of JIT compilers provide a robust native secu…: Sandboxed renderers and the total exclusion of JIT compilers provide a robust native security model.
Modern graphical standards including WebGL 1, WebGL 2, and default WebGPU are fully suppo…: Modern graphical standards including WebGL 1, WebGL 2, and default WebGPU are fully supported.
Local automated agents can control browser functionality over loopback using an opt-in to…: Local automated agents can control browser functionality over loopback using an opt-in token-authenticated MCP server.
Sources checked by our analysis pipeline: 1
Nordstjernen Web Browser
Nordstjernen is a web browser, written from scratch in C, focused on supporting the HTML and CSS standards. It runs on Windows, macOS and Linux, with builds for Android, FreeBSD, NetBSD and the JVM. Nordstjernen is built in Norway.
Nordstjernen Sol Explorer version 1.0.40 released! Shared Web Workers, ElementInternals
for form-associated custom elements, real popups that talk to their opener, <frame>
documents, hardware VP9, AV1 and HEVC decoding through GStreamer, H.264 preferred wherever the operating system decodes it, an optional memory-safe Rust IPC parser, and a run of frame, CORS and cookie security fixes. More info here.
Northstar Browser version 1.0.20 released! Video decoded by the operating system by default — Media Foundation on Windows, GStreamer on Linux — fonts loaded through the FontFace API, YouTube and Media Source fixes from Nordstjernen Sol, and security fixes for module-import CORS, cached security headers, HttpOnly cookies and frame sandboxing. About Northstar · More info here.
Southstar Browser version 1.0.6 released! The Rust version of Nordstjernen now plays MP4 and H.264 video on Windows through Media Foundation, with fixes for…
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