If you are browsing GitHub it is very tempting to open up the source code to some project and peek at how it works. The code view is easy to read, but the viewer lacks one important feature: the ability to click on an included file and find it. The Octolinker extension fixes that oversight.
If you want to try it without installing the extension, there is a mock-up demo available. Even though the demo wants you to click on specific things, if you don’t play by the rules it will still do the right thing and take you to either the code on GitHub or an appropriate page. You can even substitute the demo URL for github.com and try it out on any GitHub page without the extension.
The tool supports at least 20 languages although we were bemused to see that C and C++ were not among them. The developer claims that none of your source code is ever sent out of your browser by the extension. If you use Octolinker on a private repository, you also have to supply a GitHub API token and that’s never sent out of your browser, either, according to the web site.