Bookcicle Brands · Open Source Privacy
Your Privacy by Bookcicle
A lightweight, transparent browser extension that calculates an empirical privacy score for every webpage you visit. Engineered with 100% local-only execution, zero telemetry by default, no user accounts, and deterministic scoring under Engine 2026-09-v2.
Note for Chrome users: If Enhanced Safe Browsing is enabled, Chrome may show a standard notice stating that this extension is not yet trusted by Enhanced Safe Browsing. This is standard automated behavior for all newly published extensions—simply click “Continue to install” to proceed.
100% Local-Only
All network request audits, cookie classifications, and scoring calculations happen strictly inside your browser memory and local storage.
Zero-Tracking Philosophy
No surveillance, no cookies, no advertising IDs, and no accounts. Zero telemetry by default—your browsing history never leaves your device.
Deterministic Math (v2)
No subjective black-box ratings. Transparent deductions for third-party domains, trackers, cookies, session replay, platform risk, and browser fingerprinting.
The Scoring Algorithm (Engine 2026-09-v2)
Every page starts at a perfect baseline score of 100. Deductions are assessed deterministically across seven observed tracking and surveillance vectors:
- Third-Party Domains: -5 points per external domain outside the site's primary registered origin (eTLD+1). Read deep dive →
- Known Ad & Behavioral Trackers: -15 points per identified advertising or tracking signature. Read deep dive →
- Cross-Site Tracking Cookies: -8 points per external domain setting or transmitting cookies. Read deep dive →
- Invasive Session Replay: -25 points for script-based session recording (e.g., Hotjar, Contentsquare, FullStory, LogRocket). Read deep dive →
- Platform Risk: -30 points for dominant surveillance ecosystems (Meta / Facebook, ByteDance / TikTok, Amazon Advertising). Read deep dive →
- In-Page Fingerprinting: -20 points for canvas, WebGL, AudioContext, or font enumeration fingerprinting heuristics. Read deep dive →
- First-Party Telemetry Beacons: -10 points for high-frequency behavioral telemetry endpoints streaming user events. Read deep dive →
Scores are clamped between 0 and 100 via Score = max(0, min(100, 100 - Total Deductions)), mapped to intuitive visual bands: 80–100 (Good / Green), 50–79 (Moderate / Amber), and 0–49 (Poor / Red).
Privacy Controls & Settings
The extension provides granular, user-first controls:
Community Defense (Opt-in)
Strictly anonymized, weekly deduplicated reports (maximum 1 per domain per week) to compile transparent web privacy audits without identifying individual users.
Page Journeys (Opt-in)
Anonymous path transition graph edges with fully sanitized route identifiers (/:id/, /:uuid/) to observe tracking patterns without user session stitching.
Bookcicle Zero-PII Guarantee
Your Privacy operates locally in your browser with zero telemetry by default. Opt-in Community Defense reports contain visited domains, calculated privacy scores, and coarse tracker category counts. When Page Journeys is also enabled, reports include transitions between sanitized paths. These report payloads exclude cookies, authentication headers, browser fingerprints, session tokens, IP addresses, and personal identifiers.
Browser & Platform Compatibility
Your Privacy is engineered using modern WebExtension standards to run across major desktop engines and extension-capable mobile environments:
| Platform | Browser | Engine / Spec | Support Status | Details |
|---|---|---|---|---|
| Desktop | Chrome, Brave, Edge, Arc, Opera | Chromium · Manifest V3 | ● Full Support | In-memory service workers with standard request audits. |
| Desktop | Mozilla Firefox | Gecko · Manifest V3 | ● Full Support | Background event scripts with Gecko 109+ APIs. |
| Android | Firefox for Android | Gecko · WebExtensions | ● Full Support | Native mobile add-on with touch-adapted HUD. |
| Android | Kiwi Browser, Lemur, Yandex | Chromium · Manifest V3 | ● Full Support | Full Chromium mobile extension runtime. |
| iOS & iPadOS | Orion Browser | WebKit · WebExtensions | ● Full Support | Native iOS browser with dual Chromium/Firefox engine. |
| Mobile | Chrome Mobile & Safari Default | Blink / WebKit | ✕ Extensions Disabled | Google and Apple disable extensions on default mobile engines. |