Devices
Settings → Devices lists the browsers currently signed in to your account. Each entry is registered the first time you sign in from that browser.
Why this exists
Section titled “Why this exists”Accounts are for one person. The device list makes shared access visible to you rather than invisible to everyone — if you see a browser you do not recognise, you can end it yourself.
Revoking a device
Section titled “Revoking a device”Revoking signs that browser out immediately. The next request it makes is refused, so a revoked session cannot keep copying screens.
Revoke anything you do not recognise, then change your password in Settings → Account if you have one set.
“I’ve been signed out”
Section titled ““I’ve been signed out””If a device you are using was revoked, you will be signed out and copies will fail. Signing in again re-registers the browser and everything resumes — nothing about your account or saved screens is affected.
Each browser counts separately. Chrome and Safari on the same laptop are two devices, and clearing your browser storage can register a fresh one.