Changes apply immediately and are saved for next time.
Privacy
WebRTC leak protection
Stops sites from discovering your real IP through WebRTC. Strongest with Tor on. On by default.
Block camera
Deny camera access by default — also hides your camera's name from fingerprinting.
Block microphone
Deny microphone access by default — also hides your mic's name from fingerprinting.
Block location
Deny geolocation requests by default.
General
Reopen tabs on launch
Restore the tabs from your last session when Theseus starts.
Performance
Throttle inactive tabs
Background and inactive tabs use far less CPU. Recommended.
Anti-fingerprinting
Timezone
What sites read via JavaScript (Intl / Date). Hide reports UTC; Change lets you set your own.
Language
navigator.language and the Accept-Language header. Hide reports en-US; Change lets you set your own.
Theseus is honest about its limits: these reduce tracking and hide your IP, but a custom
browser can still be fingerprinted. For maximum anonymity, use the Tor Browser.