This Chrome extension is available here__ on the Chrome Web Store.

__ https://chrome.google.com/webstore/detail/browsing-activity-tracker/maialhkckkpdbhimboiimgdgmhlianje

To install from source:

* Go to ``chrome://extensions``.
* Enable the *Developer mode* option.
* Click on *Load unpacked extension…* and select the folder containing the
  source code.