Chrome Extension

Carbon Calculator is available in the Google Chrome Web Store here: Download Carbon Calculator for Google Chrome

Installation

Simply click the link above and then click the blue "Add to Chrome" button:

After this, you'll see an orange banner at the bottom of supported pages like this:

Privacy

Carbon Calculator does not collect any information as you browse, nor does it share any information with third parties. Carbon Calculator does need to ask for Chrome permissions so it can read the price from websites. The code is fully open-sourced here so that you can take a look for yourself: Carbon Calculator Source Code