Short answer: Tails is a live operating system from a USB stick. It routes network traffic over Tor by default and usually leaves no traces on the host computer’s hard drive. It does not heal compromised firmware or bad OPSEC. Download the image only from tails.net and verify it.
What Tails is for
For sessions that should leave as little as possible on the computer after shutdown: research, separated roles, work on someone else’s hardware. It is heavier than Tor Browser alone and often unnecessary for everyday use. Longer treatment: Tails live USB.
What “amnesic” means
Without persistent storage, installed programs, browser data, and documents disappear when you shut down. An optional encrypted area on the stick can keep selected files — a trade-off between convenience and attack surface.
Compared with Tor Browser
| Tor Browser | Tails | |
|---|---|---|
| Layer | Application | Entire OS |
| Traces on the disk | Depends on the host system | None by default |
| Effort | Low | USB, verification, reboot |
| Against firmware malware | No | No |
Whonix isolates differently (workstation behind a gateway VM). The choice follows the threat model, not marketing.
Verification
Download the image from tails.net and check the signature and checksum per the official instructions. Unofficial “Tails downloads” are phishing. See Detecting phishing.
Sources
- Tails: Official website and installation
- Tor Project: Tails overview