Below are the most frequently asked questions about donating to the Mozilla Foundation.

When you donate to the Mozilla Foundation, we receive personal information from you. We use this data to acknowledge your donation, provide you with donation receipts, and correspond with you through newsletters or email. You can read more about what information we receive, the purposes we use that information for, and how we handle it in our Privacy Policy.

We work hard to protect your information. We believe in, and practice, multi-layered security controls and practices, including both technical and organizational methods. We have agreements with third parties and have adopted other security measures to protect against the loss, misuse and/or unauthorized alteration of the information under our control or under the control of our service providers. The vendors receiving your information are contractually obligated to handle the data in ways that are approved by Mozilla. The vendors we use to send emails or other marketing materials to you aren’t permitted to use your information for their own direct marketing purposes. They also aren’t allowed to share your data with anyone else for direct marketing purposes. In addition, we will keep your personal data only for as long as we need it to provide you services, manage our business or as required by law or contract. You can find more information in the Privacy Policy section titled “What else should you know?”

Except as disclosed in our Privacy Policy, we do not share any personal data unless you expressly agree that we may do so. More specific information is available in our Privacy Policy in the section titled “When do we share your information with others?”

Finally, when you donate to Mozilla through a third party like PayPal or Braintree, those organizations also collect your data. Their collection and use of your data is governed by their respective privacy policies.

We understand that your privacy is very important. We ask for a minimum amount of information required to process credit/debit card donations, including billing addresses. This allows our payment processor to verify your identity, process your payment, and prevent fraudulent charges to your card. We keep your information private — if you have questions, please refer to our Privacy Policy. If you would rather not fill in your information on our online donation form, you can mail a check or money order.

UPDATE October 2020: The Mozilla Foundation is happy to accept your donation (made payable to “Mozilla Foundation”) via check; however please note that processing and acknowledgment of your gift may be delayed by changes to our office procedures due to the COVID-19 pandemic. You can send checks to:

Mozilla Foundation, attn: Donor Care
2 Harrison Street, Suite 175
San Francisco, CA 94105

Please include your email address on the memo line of your check to help us track and attribute your gift.

Please also note that the Mozilla Foundation can only accept checks in U.S. dollars drawn on a U.S. bank, and cannot accept contributions for MZLA/Thunderbird. (Contributions to MZLA/Thunderbird via check can be made by following these instructions.)

No. As of January 2022, the Mozilla Foundation is reviewing its cryptocurrency policy and its alignment with our climate change commitments. We have paused cryptocurrency donations during this time.

At Mozilla, our mission is to keep the Internet healthy, open, and accessible for all. To learn how your donation is put to use, click here.

You can find more details about Mozilla’s expenditures and governance here.

Firefox is maintained by the Mozilla Corporation, a wholly-owned subsidiary of the Mozilla Foundation. While Firefox does produce revenue — chiefly through search partnerships — this earned income is largely reinvested back into the Corporation. The Mozilla Foundation’s education and advocacy efforts, which span several continents and reach millions of people, are supported by philanthropic donations.

Last year, more than 400,000 individuals gave to Mozilla to protect and improve the health of the Internet. The Mozilla Foundation also receives support in the form of grants from other like-minded major foundations, including the Knight, MacArthur, Bill & Melinda Gates, and Ford foundations.

Anyone can access tech support for Mozilla’s products by visiting the support forum. Mozilla does not provide tech support or enhanced tech support in exchange for donation.

Contributions go to the Mozilla Foundation, a 501(c)(3) organization based in San Francisco, California, to be used in its discretion for its charitable purposes. They are tax-deductible in the U.S. to the fullest extent permitted by law. The Mozilla Foundation Tax ID is 20-0097189.

For donors outside of the United States, please consult with your tax adviser about whether your donation is tax deductible.

In the case of some substantial gifts, we may be required to report names and addresses to the IRS. Mozilla is required by law to report this information for its substantial donors and for cash equivalent in-kind gifts, like stocks, over $5,000.

If you give to Mozilla online, you should immediately receive an emailed receipt for your donation that you can use for your U.S. tax preparation purposes. Please check your spam or junk folder if you don’t see that email arrive in your inbox. If you need an additional copy of your receipt for your U.S. tax preparation purposes, please contact us via this form.

If you used PayPal to set up a recurring donation, you’ll need to log in to your PayPal account to make changes or to cancel. If you made a monthly donation using your credit card, please contact our support team via this form. Please include the email address and name you used to make your donation, and we’ll try to help you within two business days.

Yes. On our online form, use the drop down menu on the form to select any of over three dozen currencies.

Yes, we generally accept gifts of publicly traded stocks and bonds, and will consider other gifts of securities on a case-by-case basis. Please contact Jesse Ward at [email protected] for more information. (You should consult your tax adviser on the extent to which you may deduct charitable contributions of certain securities and the documentation you need in order to claim a deduction.)

Absolutely! We understand that not everyone can support our mission financially, but there are many ways to help Mozilla and be a part of our community. In fact, the success of our mission depends on participation from people like you. Find the best way for you to get involved with our community here.

If you have a question about donating to the Mozilla Foundation, please contact us via this form. We will do our best to follow-up with you within 72 hours. If you need technical support for products such as Firefox, please contact Mozilla Support for assistance.

Generally speaking, only long enough to do what we collected it for. Please refer to the Mozilla Privacy Policy for more details.

Yes! We’re registered with most major matching gift portal systems, and would be happy to work with you to get your donation matched by your employer. Please contact us via this form if you have any questions or need assistance.

Yes! Please visit this donation form to make a contribution specifically for Thunderbird.

Nonprofit organizations are a common target for online credit card fraud. Use of reCaptcha is one way we’re working to protect against automated abuse and prevent fraudsters with stolen card information from testing these numbers on our donation forms. We care about your privacy. When Mozilla (that’s us) collects information about you, our Mozilla Privacy Policy describes how we handle that information.

Use of the Invisible reCAPTCHA is governed by the Google Privacy Policy and Terms of Use.

Yes! The Mozilla Foundation is enrolled in both eBay for Charity and the Amazon Smile Program. On eBay, you can add us as your favorite charity, shop for items where a portion of the sale benefits the Mozilla Foundation, or sell your own items and direct a percentage of the sales price to benefit the Mozilla Foundation. On, please remember to initiate all your purchases by starting at