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VSCodium uses the Open VSX Registry instead of Microsoft's marketplace, which causes missing extensions, silent search failures, and version lag. A diagnostic guide to identifying the cause and choosing the right fix.
VSCodium replaces the default extension marketplace with the Open VSX Registry to strip Microsoft telemetry. Learn how this affects extension installs, what to watch for, and when you might need to add the original gallery.
Learn how Vscodium strips telemetry, defaults to the Open VSX registry, and how to verify its builds while installing extensions without Microsoft’s marketplace.
Learn how VSCodium’s built‑in Open VSX Registry support lets you install and publish VS Code extensions without Microsoft accounts or telemetry, with a concrete install/publish example and verification steps.
Learn how VSCodium uses the Open VSX Registry instead of the Microsoft Marketplace and how to manage missing extensions via .vsix files and product.json configuration.
VSCodium isn't just VS Code with telemetry off — it's a different extension supply chain. Here's how the Open VSX marketplace difference plays out and how to onboard a team safely.
VSCodium is built from the MIT-licensed VS Code source but strips proprietary branding and telemetry. This process modifies the internal product identifier used by the application to identify itself to extensions. Certain extensions are hard-coded to target the vscode product ID. When these extensions are installed via the Open VSX Registry, they may fail to
VSCodium ships with the Open VSX Registry as its default extension source to keep the build free of Microsoft telemetry and branding. This default ensures a privacy‑focused environment but means that extensions are available only when their publishers opt in to Open VSX, which can result in version lags compared to the Microsoft Marketplace. For extensions t
Extension Identity Management VSCodium replaces the proprietary Microsoft Marketplace with the Open VSX Registry to maintain a telemetry-free environment. While standard extension installation is seamless, authentication for private registries or restricted extension scopes relies on the underlying operating system's keychain and specific OAuth flows. Creden
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