Changes apply immediately and are saved for next time.
Website language
Preferred language
Also switchable from the globe icon in the address bar.
Translate pages
Translate a page's visible text in place to your preferred language. The Accept-Language row above only asks the server for a translated body — many static sites (including names on BCDN) serve only one language, and translation turns them readable without a reload.
Offer to translate
Light up a translate chip in the address bar when the page's declared language is different from the one you picked above.
Translation engine
LibreTranslate-compatible endpoint. The public free tier is rate-limited; point this at a self-hosted LibreTranslate for unlimited use and privacy. On-device Bergamot (WASM) is coming in a later release.
API key (optional)
Some LibreTranslate instances need an API key for the paid tier or to raise the rate limit. Leave blank for the public endpoint.
Startup
Open previous windows and tabs
Restore the tabs from your last session when Theseus starts.
Updates
Theseus already checks the release manifest at boot and every 6h. Click below to check right now.
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Quick links
Opera-style strip on the left edge with shortcuts to web apps. Click a row's URL to edit. Shows the first letter of the title when there's no icon.
Show the strip
A thin vertical column on the left side of every page.
Links
Appearance
Choose a theme for the browser. System follows your operating system's light/dark setting.
Developer tools
Where the Chromium DevTools panel appears when you press F12 or Ctrl+Shift+I. You can always drag it out to a separate window from inside the panel.
Registries
How Theseus picks between the BCNR / BCDN and ICANN / IANA, when a name exists in both.
Collision policy
A name only exists in both registries when its TLD isn't BCNR-unique (e.g. .de). BCNR-unique TLDs (that only exist on BCNR) never conflict.
Remembered choices
"Always use …" picks you made from the switcher or the prompt. Reset them to be asked again.
A local daemon that resolves BCDN names for every browser on this machine (Chrome, Edge, Firefox, etc.), not just Theseus. Turning it off means non-Theseus browsers stop resolving .bch / .x / other BCNR TLDs; Theseus keeps working either way, since it has its own built-in resolver.
Status
System-wide resolver
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Ariadne's Thread isn't installed on this machine. Click Install below to run
the bundled installer, or grab it manually from
silentmode.st/tools.
Collision policy
When a name exists on both BCNR and ICANN, which one wins? Applies machine-wide — every browser sees the same answer. Change is picked up within 5 seconds; no daemon restart, no UAC.
Sources
Each index source can be toggled independently to isolate a path or measure without it. Changes hot-reload every 5 s via C:\ProgramData\Ariadne\policy.json — no restart. State column shows the last attempt result for each.
SourceEnabledState
Status report
Full snapshot of what the daemon currently sees — daemon version, permitted TLDs, index size, last fetch per source. Paste into a support conversation.
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Remove
Uninstall the resolver from this machine. Theseus itself keeps working — its built-in resolver isn't affected.
Uninstall Ariadne's Thread
Removes the two scheduled tasks and deletes C:\ProgramData\Ariadne\. Prompts for admin.
Multi-chain wallet (BCH, BTC, TRX, ETH, SOL, SC, DGB) that ships in the box. Bundled with Theseus, but updates are delivered over-the-air: new signed versions land without a Theseus release. Runs entirely inside this browser — never system-wide.
Status
Aegis wallet
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Aegis lives in the Extensions folder alongside every other add-on; to remove it, use Extensions.
Search
Pick what your address bar and the toolbar dropdown search with.
Default search engine
Used when you type into the address bar.
▾
Additional search engines
These appear in the toolbar dropdown. Drag to reorder. Toggle off to move an engine back to the catalog.
Add from catalog
Discover more engines
Or add a custom URL
Passwords
Local password vault. Set once, unlocked with a master password. Encrypted at rest; nothing leaves your machine.
Master password
Used to unlock the vault every session. This is separate from your Ariadne wallet passphrase — memorize it, we can't recover it.
Seed for deterministic passwords
The "Generate" button in an entry derives a password from this seed. Same seed on another device → same passwords for the same site + username.
The mnemonic is used only to derive the password-purpose subtree (m/1381'/0'). It is not stored — only the derived subtree key is persisted, encrypted with your master password.
Unlock vault
Enter your master password to view or add entries.
Your passwords
Reveal, copy, or edit any entry. The vault re-locks when Theseus quits.
Add an entry
There is no autofill yet (phase 2). Copy the password from an entry and paste it into the site.
Performance
Keep Theseus light on resources. Trackers, ads and cookie pop-ups are under Privacy.
Throttle inactive tabs
Background and inactive tabs use far less CPU. Recommended.
Stop tabs in the background
A tab you switch away from stops running — scripts, timers, audio and video — until you come back to it. Right-click a tab and choose “Keep running in background” for music, calls or anything that should keep going.
Privacy
What Theseus keeps from sites: trackers, ads, cookie pop-ups, your device and your whereabouts.
Theseus is on guard
Shield…
Cookie pop-ups…
Tor…
Theseus
Tracking protection
Shield — block trackers and ads
Requests to known tracking and advertising hosts never leave Theseus.
Cookie pop-ups
Consent banners are answered for you before they get in the way.
Manage exceptions
Sites where Shield is allowed through or cookie pop-ups are left alone.
›
Tell sites not to sell or share my data
Sends the Global Privacy Control signal with every request. Sites in California, Colorado, Connecticut and other places with a privacy law must honour it.
Shield and Cookie Pop-ups also sit in the toolbar's extension row if you want them there: right-click the row and choose "Show hidden".
Device access
WebRTC IP policy
Controls which IP addresses WebRTC may reveal — the same thing the "WebRTC Network Limiter" extension does, built in. Public interface only hides your local IP; Disable non-proxied UDP is strongest. Tor forces the strongest automatically.
Block camera
Deny camera by default — also hides its name from fingerprinting.
Block microphone
Deny microphone by default — also hides its name from fingerprinting.
Hide media devices
Blank the labels and IDs of all cameras, microphones and speakers from enumerateDevices() — closes a WebRTC fingerprinting leak, like Firefox.
Anti-fingerprinting
For each: Show (real), Hide (neutral value), Spoof (a decoy), or Manual (set your own).
Timezone
What sites read via JavaScript (Intl / Date).
Language
Same control as General › Website language and the globe chip in the URL bar.
Location
Hide denies geolocation entirely; Manual reports the coordinates of a country you pick, so a page's navigator.geolocation answers with a plausible position instead of your real one.
These reduce tracking and hide your IP, but a custom browser can still be fingerprinted. For maximum anonymity, use the Tor Browser.
Network
Tor onion routing
Off
VPN
Route everything through a Silent Mode exit, or your own. Managed in its panel.
›
DNS over HTTPS
Encrypts name lookups so your network cannot see or alter which sites you are about to visit. Silent Mode names never use DNS; this covers the rest of the web.
Provider
Browsing data
By default Theseus keeps nothing across sessions — everything toggled on here is wiped when you quit. Untoggle a bucket to keep it (e.g. cookies to stay signed in on trusted sites).
Clear cookies on quit
Drops session + persistent cookies. You'll sign in again next launch.
Clear HTTP cache on quit
Drops cached images / scripts / stylesheets. Sites re-download; small disk win.
Clear site storage on quit
Drops localStorage, IndexedDB, service workers, and the cache API. Web-app state resets.
Clear history on quit
Drops navigation history + the saved-tabs session file (overrides "Reopen previous tabs").
There is no persistent password manager — passwords are never stored to disk regardless of these toggles. Use a dedicated password manager (Bitwarden, KeePass, etc.).
Sites you asked Shield or Cookie Pop-ups to leave alone. Remove one to protect it again.
Shield allowed through
Cookie pop-ups left alone
Extensions
Small modules that add capabilities to Theseus. Extensions live as folders under
%APPDATA%\Theseus\extensions\. Drop a folder in, restart, it's live.
Bundled reference extensions (like the Notepad) are copied there on first run — you can edit or remove them
without losing anything the browser needs.
To install a new extension, browse the catalogue at
theseus.x/extensions
and use the Install button there. Theseus checks each publisher's signature against the name's current
owner on chain before installing — the relay can't substitute code under a trusted name. Extensions run
with full app access — treat installing one like installing an unsigned executable, and only load
extensions whose source you trust.