MozShell is Komodo extension used for inspection / debugging JavaScript in the xulrunner based applications. Extension integrates into the editor and gives developer ability to inject JavaScript code to application during run-time. Extension creates telnet connections with xulrunner applications what makes possible to have editor on the different machine and the from the application. Useful while working on multi-platform applications as developer can use primary OS for development and VM's for testing / debugging. Extension requires installation of MozRepl extension on the xulrunner application side.