A calm, sidebar-first browser built around privacy. Ads and trackers blocked out of the box. AI that stays off until you ask.
AI is off. Nothing on this page is read by a model.
Interactive mock. Click tabs, Spaces, the shield, the tab layout and the AI switch.
The annoyance: Ad blockers got weaker.
Chrome's Manifest V3 switch turned off full uBlock Origin in 2025. uBO Lite has rule caps and no default cosmetic filtering.
Blocking is built into the browser, not bolted on as an extension. It handles network and cosmetic filtering with EasyList, EasyPrivacy and uBO-style rules, and extension API changes cannot switch it off.
The annoyance: The browser is run by an ad company.
Google dropped Privacy Sandbox in Oct 2025 and kept third-party cookies.
Third-party cookies blocked, fingerprinting randomised, tracking parameters stripped from links, Global Privacy Control sent on every request, bounce-tracking blocked.
The annoyance: AI pushed into everything.
Gemini shortcuts and panels with no clean off switch.
One switch. Local model first. Nothing on a page goes to a model unless you invoke it.
The annoyance: RAM and battery.
Background tabs freeze after 15 minutes. A per-tab memory meter sits in the sidebar, and whole Spaces can hibernate.
The annoyance: Tab overload.
Auto-archive after 12 hours (adjustable), a searchable archive, and Spaces for separate contexts.
The annoyance: Cookie banners, notification prompts, autoplay.
Cookie banners auto-rejected and hidden. Notification permission requests collapse into a small chip. Autoplay with sound is blocked.
The annoyance: Account and sync pressure.
Optional end-to-end encrypted sync. One-click import of bookmarks, history and pinned tabs from the browser you use today.
The annoyance: Browsers that get abandoned.
If Noctarc ever stops active development, the browser shell is released as open source so users are not stranded.
Sources: uBlock Origin project site; Engadget on Privacy Sandbox (Oct 2025).
The name
/nok·tark/ — noct, the Latin root of nocturnal, joined with arc, the curve of the night sky.
noctarc.comnoctarc.dev
Tabs live in the sidebar by default, with room for long titles and Spaces. Prefer a tab strip along the top? Switch to horizontal tabs in one click, per window.
Separate contexts, each with its own pinned tabs, theme and, optionally, cookie jar.
Improvement: each Space can be a privacy container, so Work logins never see Personal.
Open external links in a small floating window, then keep them or close them without losing your place.
⌘T for tabs, history, commands and actions. Works without AI, and takes natural-language commands with AI on.
Up to 4 panes, saved per Space.
Restyle or hide parts of any site. Stored locally and shareable as files.
Tabs you don't revisit leave on their own. Auto-archive after 12 hours (adjustable), with a searchable archive.
Background tabs freeze after 15 minutes. A per-tab memory meter sits in the sidebar, and whole Spaces can hibernate.
Default
No model loaded. Nothing read.
Every blocker, shield and container is free. Subscriptions pay for compute and convenience.
$0
$6/month
or $60/year
$18/month
or $180/year
Founding members: first year of Plus for $39, open to the first 5,000 sign-ups.
Concept pricing — subject to change before launch.