The source is not available on GitHub yet. To view the source code, install the extension, then you can find it in:

* Linux ~/.config/google-chrome/Default/Extensions/eookhngofldnbnidjlbkeecljkfpmfpg * MacOS ~/Library/Application Support/Google/Chrome/Default/Extensions/eookhngofldnbnidjlbkeecljkfpmfpg