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Supermium vs NetSurf: catalog facts
Supermium	NetSurf
Free Free to download from its GitHub repository.	Free Free and open source under the GPL version 2.
Windows	macOS, Linux
Current Chromium engine on Windows XP through Windows 8.x Tracks recent Chromium versions	Very small and light on resources Independent layout engine written in C
Windows only Maintained by a small team, so security fixes may lag behind Chrome	Limited support for modern script-heavy websites Not a replacement for a mainstream browser on current sites
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.