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Questions about donating? See common answers below. If you still need help donating, please contact us via this form.
Want to provide product feedback? Head over to Mozilla Connect.
Need product or technical support? Visit our knowledgebase and community support forum.

Access your plan details from the Donor Portal or from the 'Manage My Donation' button on your recent donation confirmation email. You can change the amount, frequency, payment method and charge date. You can also cancel your recurring plan and download your receipts.

All Thunderbird technical support is community-based and available to everyone. Visit our support forum. We do not provide individual tech support in exchange for financial gifts.

You will receive an email confirmation whenever you donate and this will include a receipt for your records. You can also access your receipt history at any time from our Donor Portal.

Gifts to Thunderbird are not tax-deductible as charitable gifts, but are greatly appreciated!
Giving to Thunderbird supports the development of open source apps that are secure, private and available for users around the world. Your support also ensures that our core apps remain free for everyone.

We understand that your privacy is very important -- we agree, and that's a core value of ours at Thunderbird and Mozilla. Your address is part of our Payment Processing, Contact and Donation Information that we outline in our Privacy Policy. This data is used for payment processing, transactional receipts, fraud detection and record-keeping purposes. If you want to know more about the personal information data we receive, the third-party vendors we trust, and how long we keep your data, please refer to our Websites, Communications & Cookies Privacy Notice.

To learn how to customize your start page please visit:
https://support.mozilla.org/kb/how-disable-or-change-thunderbird-start-page

When you donate via our online form, simply check the box 'Donate as an Organization' and include your company name. Your transaction receipt will include your company name. If you need a copy of your receipt, download from our Donor Portal.

Yes, we use industry-standard SSL technology to keep your information secure. We partner with Stripe, the industry's established payment processor trusted by some of the world's largest companies. Your sensitive financial information never touches our servers. We send all data directly to Stripe's PCI-compliant servers through SSL. We understand that your privacy is very important. For complete information please refer to the Mozilla Privacy Policy.

Your donation may be eligible for a refund. You must contact us within 15 days of payment date. If you believe this payment was made without your authorization, please contact us immediately. Donations made via ACH or SEPA direct debit are ineligible for refunds. Due to the nature of these transactions our policy prioritizes minimizing refund fraud. We appreciate your understanding. If you need assistance, please contact us.

We do not collect any additional fees or taxes. When you donate in your local currency you are not charged a conversion fee by your credit card. You can choose to also cover the payment processing transaction costs. This is completely voluntary and you may opt in or out using the checkbox on our donation form. Our organization is based in the United States. We encourage donors to research any additional external taxes or fees that may be applied by regulators such as your bank or tax authority.

When you opt to cover our payment transaction costs, you're covering both our payment processing and donation platform fees. The costs associated with our robust online donation system allows us to continue scaling sustainably as our supporter-base grows. Our donation platform and payment processor partners reduce internal costs associated with maintaining our own system from scratch. Our partners ensure we can accept a wide range of currencies/payment methods and remain PCI compliant in all of the countries that we accept gifts from. The transaction costs you may choose to cover are based on an estimate of our overall costs. Due to many factors actual costs may fluctuate.

When making a one-time gift through SEPA direct debit, you may notice a mention of recurrent transactions. This is because our payment processor Stripe only supports recurring transactions for this type of payment. Regardless of this, we will only charge you once and we will not make any further payments on your account without your authorization. Following the mandate, you will receive an official donation receipt that will clearly reflect the one-time donation.

No. We are not currently accepting cryptocurrency gifts.

Thunderbird is the leading open source email and productivity app that is free for business and personal use. Your gift helps ensure it stays that way, and supports ongoing development.

MZLA Technologies Corporation is a wholly owned for-profit subsidiary of the Mozilla Foundation and the home of Thunderbird.

Currently, nearly 100% of Thunderbird’s operating revenue comes from the generous gifts of Thunderbird users.