Mozilla Foundation employee here! You probably donated through https://donate.mozilla.org, so I thank you earnestly for that! With that donation you're supporting our work to protect the health of the internet, fueling the movement to keep the web decentralized, open and free. Some of the projects we've worked on include http://privacynotincluded.org/ and our advocacy campaigns like https://advocacy.mozilla.org/en-US/net-neutrality. We also sponsor a whole host of fellows doing deeper dives on things like the dangers of Aadhaar in India and Tech Policy in Washington D.C. (https://foundation.mozilla.org/opportunity/2017-tech-policy-...). You can learn more at https://foundation.mozilla.org/about/