Switchyardwatches how ads, trackers, and consent banners actually behave on the page — not just which URL they came from — and writes compact declarative rules that fit Chrome’s new MV3 limits while still catching cloaked, rotating, and AI-generated creatives.
Free, per-site readability view. Paid fleet tier & dev API on request.
Section: <main id="story">
a11y tree intact · no sponsor markers · 124 children
Div.slot-mega-ad
auto-injected above-the-fold · CLS contribution 0.42
Iframe: consent-banner.civic.gov
preserves consent flow · explicit role=dialog
Script: tracker-rotate.min.js
domain mutated 3× / hr · fingerprint of rotating cloaker
Inline summary element
content-bearing · first paint 312ms · source-stable
Built for the surfaces where ads hurt most
How it works
Chrome’s MV3 caps dynamic filter rules at 5,000 and major platforms actively detect blockers. Most ad blockers play whack-a-mole; we teach a small model to recognise what an ad does, then emit rules that fit under the budget.
Local inference only
Pages you visit never leave the device. Models update silently from a signed bundle.
On every render, the extension records the elements an ad, tracker or consent banner actually touches — paint rects, network calls, role mutations, accessibility tree deltas. Not just the URL.
A small model ranks each candidate block on three axes: source risk (cloaking, rotation), behaviour risk (auto-injection, CLS injection), and ship risk (a11y tree, layout, consent flow).
Decisions compile down to a compact denylist inside Chrome's MV3 rule budget. Errors fall back to a deterministic baseline rule list, so a model failure never breaks the page.
Where it works
92% tag-manager weight reduced
Legacy tag managers stack jQuery + 14 analytics vendors on a single permit page. We collapse what's unreachable behind polluted captures while keeping forms, accessibility trees, and language switchers intact.
preservation target forms
Detection signals rewritten
YouTube, Twitch, and a long tail of streaming sites fingerprint traditional blockers. Our filter runs in the DOM and the service worker so the detection surface we expose is much smaller.
preservation target dom
4,217 of 5,000 MV3 slots
We tune for cluttered domains with rotating cloakers, AI-generated creatives, and consent banners that load above-the-fold. Most other blockers either miss these or break page layout.
preservation target layout
Pricing
Schools, libraries, and small agencies run hundreds of devices. Fleet plans add dashboards, policies, and an audit log of every rule the extension serves.
FAQ
Pick the shortest answer that matches your buyer. For everything else, write to switchyard-9@polsia.app.
Get the extension
We’re onboarding the first 500 households and the first 50 fleet customers for the v0.4 beta. Email is the fastest route to either.