Nosey is an extension for Chrome which allows you to browse through the source code of a repository or even an application. The extension enables you to go through the documentation, or even see the files which the extension knows about. It works through GitHub, as it provides a great platform for developers to work on their projects and it's very easy to use. The extension is integrated with GitHub, so it will only work for users which have already installed it on their browser. You can even search for a file by typing a name on the search box, and it will open the correct file.

Nosey extension is also integrated with Vim, which makes it even easier to search. This way, you don't have to be afraid of having no idea about the file you're browsing.