Tails 7.5 is now available, bringing a fresh set of security-focused improvements and updated core software to the privacy-first live Linux operating system. Built on Debian and designed for people who want strong online anonymity, Tails routes internet activity through the Tor network and is widely used by security-conscious users around the world. The project traces its roots back to 2009, when two earlier live distributions were merged into what became The Amnesic Incognito Live System, better known today as Tails.
This release arrives shortly after the previous update (version 7.4.2, released on February 11), and it puts a lot of attention on one app in particular: Mozilla Thunderbird. With Tails 7.5, Thunderbird is now installed as Additional Software at every startup for systems configured to do so, which is important for anyone using Persistent Storage with Additional Software and Thunderbird enabled. In practical terms, that means users can start each session with a more up-to-date Thunderbird installation automatically, improving security compared to earlier behavior.
Tails 7.5 also updates key privacy components. It ships with Tor Browser 15.0.7, which includes a simplified homepage, along with Tor client 0.4.9.5. Thunderbird itself is updated to version 140.7.1. One challenge Tails users should still keep in mind is timing: new Thunderbird releases can sometimes arrive shortly after a Tails release, which may leave the built-in email client briefly behind the newest upstream version.
Another notable detail appears when Thunderbird installs successfully as Additional Software: the Thunderbird Migration dialog may display information that points ahead to the next planned milestones. It indicates an expected Tails 7.8 release window in May 2026, and it also suggests a policy shift coming at that time—Thunderbird is expected to no longer be included by default starting with Tails 7.8.
Language support also gets a small boost in this update, with Thunderbird now including language packs for Mexican Spanish and Spanish from Spain.
For those preparing to download and install, the ISO image is 1.9 GB, while the USB image is 2 GB. Tails continues to be offered in more than 30 languages and remains focused on its core goal: helping users reduce exposure to online surveillance while keeping browsing and communications routed through Tor.
