We value Open Source and make a point to release all our plugins on GitHub under a BSD License.
The WakaTime plugin works with Google Chrome Browser and is open-source on GitHub.
The Chrome extension shows the time you spend reading documentation, debugging a web app, and other browser based activity.
Install the Chrome Extension:
Login to WakaTime.
Use Chrome like normal and your time will be tracked automatically on your https://wakatime.com/dashboard.