The four extensions that make up the nRF Connect for Visual Studio Code extension set are also available on the Open VSX Registry. You can download them from the registry and install them manually in any editor compatible with Visual Studio Code that supports VSIX extensions.
Note
Nordic Semiconductor does not test editors other than Visual Studio Code for compatibility with the extensions. While you are encouraged to report any issues you encounter on Nordic Semiconductor DevZone, issues discovered in editors other than Visual Studio Code and not reproducible in Visual Studio Code will not be prioritized.