The CrossHub Chrome Extension is a useful tool for TypeScript developers working on Github. This extension adds 'Go to definition' and 'Find Usages' functionality to TypeScript projects on Github, making it easier to navigate and review code.

With the CrossHub Chrome Extension, you can click on methods, variables, or classes in your TypeScript code and quickly go to their definitions. This is extremely helpful when trying to understand how different parts of your code are connected. Additionally, you can click on declarations to find out where they are used, allowing you to easily track down references throughout your project.

One of the great features of this extension is that it works not only for the tree views but also for pull requests. This means that when someone sends you a pull request, you can efficiently review it by clicking on the methods and seeing where they come from. This saves time and improves the overall code review process.

Overall, the CrossHub Chrome Extension is a valuable tool for TypeScript developers on Github, providing enhanced navigation and code review capabilities.