The extension works as advertised, and integrates well with GitHub. There are minor usage glitches (like the highlight not always marking the current file), but nothing serious. It would be nice if the extension itself was open source so we could propose improvements and track issues.

(Old content of this review: "Works great. The only complaint I have is that the folder icons —not just the folder names— should be clickable to collapse/expand them.")

Works great on both github.com and github enterprise without any need for configuration.