Mailfence Encrypted Email Suite in Thunderbird Today, the Thunderbird team is happy to announce that we have partnered with Mailfence to offer their encrypted email service in Thunderbird’s account setup. Mailfence Encrypted Email Suite in Thunderbird Thunderbird 91 is our biggest release in years with a … Continue reading AugCOMMENTS 27 Existing Thunderbird users will be updated to the newest version in the coming weeks. The newest stable release of Thunderbird, version 91, is available for download on our website now. Keep yourself up to date with recent announcements and releases by following the official Thunderbird Blog! With Add-ons (Extensions & Themes) and many more features you can change the look and feel of Thunderbird in an instant. Multiple features, such as built-in Do Not Track and remote content blocking, work together to ensure your safety and privacy, so you can have peace of mind. Focus on what matters and forget about complexity. Thunderbird makes email better for you, bringing together speed, privacy and the latest technologies. Please follow these instructions to install Thunderbird. Your system doesn't meet the requirements to run Thunderbird.