It's always helpful to see how much data you're using, especially on limited connections. Also, your data can be disseminated over wide areas without your knowledge. This extension helps give you insight into where your data is going, and how much you're using.
What it does
Tracks your data usage across tabs using Chrome's logging and a proxy server to determine response size.
How I built it
Chrome extension and Go proxy server running on a Linode instance.
Challenges I ran into
Making the proxy server is pretty hard, actually.
Accomplishments that I'm proud of
Jake's first Chrome extension!