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Privacy Policy

Last updated: May 28, 2026

1. Our Core Privacy Commitment

Privacy is not an afterthought — it is a core principle of every SuperchargeBrowser extension. We believe your browsing data belongs to you. All our extensions are engineered to operate entirely on your device.

We do not collect, store, sell, or share your browsing history, searches, or website content on our own servers or with third parties.

2. Data We Collect (and Why)

We limit data collection to the absolute minimum required to operate our website and services.

A. Extensions: Your Browsing Data (None)

Our extensions do not transmit your browsing history, open tabs, page content, or any browsing activity to our servers or any third-party analytics service. All extension logic — including content blocking, tab management, and interface features — runs locally on your machine.

B. Extension Settings

Your preferences and extension data (such as feature toggles, saved workspaces, or whitelisted domains) are stored locally in your browser's storage (chrome.storage.local). They are never sent to our servers.

C. Cross-Device Sync (Optional — SuperchargeNavigation only)

SuperchargeNavigation includes an optional workspace sync feature. It does not upload any workspace data until you complete the one-time setup prompt in the extension. Until then, no tab URLs or titles leave your device. When enabled, workspace names, tab URLs, page titles, tab group labels and colors, and your chosen device name are synced using chrome.storage.sync — your browser's built-in sync (your Google account on Chrome, your Microsoft account on Edge). SuperchargeBrowser has no access to this data: we do not operate, read, or receive it. If you disable sync, your synced workspace data is wiped from your browser's sync. You can review how this works e.g. on Chrome at support.google.com/chrome/answer/185277. No other SuperchargeBrowser extension uses chrome.storage.sync.

D. Website: Communication

  • What: When you visit our website and provide your email address, we collect it.
  • Why: To notify you about product launches, updates, and offers.
  • Storage: This data is stored securely with our email service provider. You may unsubscribe at any time.

E. External Links

Links within our extensions and website may include URL parameters (UTM tags) to identify the referral source. These parameters are standard web analytics identifiers — they do not contain personal data and are not collected or stored by the extension.

F. Website: Browser Local Storage

Our website stores a small number of values in your browser's localStorage to render UI consistently between page visits. These values stay on your device, are never transmitted to our servers, and contain no personal data. You can clear them at any time through your browser's site-data settings.

  • changelog_review_dismissed_v1: Timestamp recording when you dismissed the changelog feedback prompt, so we don't show it again for ~7 days.
  • sb.ext.perf.seen / sb.ext.nav.seen: Timestamps recording the most recent visit you arrived from a SuperchargePerformance or SuperchargeNavigation in-extension link (identified by the UTM tag described in section E). Used to render the right "Get Extension" call-to-action — for example, if we already detected you arrived from SuperchargePerformance, the website offers SuperchargeNavigation instead. Entries expire automatically after 90 days. The extensions themselves are never queried by the website. Detection is one-way, based only on the UTM parameter on links you click.

G. Website: Feedback & Surveys

  • What: When you voluntarily submit feedback through forms on our website (such as uninstall surveys), we collect the responses you provide. We also record your browser name, version, and operating system from standard HTTP request headers to help us diagnose technical issues.
  • Why: To understand how people use our extensions and improve them.
  • Storage: Responses are stored on Cloudflare infrastructure. No personal information is required — all submissions are anonymous by default. If you optionally provide an email address, it is stored alongside your response solely so we can follow up.
  • Retention: Feedback data is retained for product improvement purposes. You may request deletion by contacting us.

H. PRO Accounts (Future Feature)

  • What: If you choose to upgrade to a PRO plan in the future, we will process account identifiers (such as an email or license key) to verify your subscription.
  • Why: Strictly to unlock PRO features.
  • Storage: Payments and subscriptions are handled by our third-party Merchant of Record. We do not store credit card details.

3. Browser Permissions Explained

Our extensions request only the permissions necessary for their features. Not every extension uses every permission listed below. Each permission is used locally — none are used to collect or transmit personal data.

  • host_permissions (<all_urls>): Allows our extensions to run their features across all websites you visit, including injecting content scripts for performance optimization, tab navigation overlays, inline page previews, and audio volume and equalizer processing. All processing happens locally. We do not read, store, or transmit page content.
  • tabs: Used to manage your browser tabs — detecting active and inactive tabs, switching between tabs, and providing tab search functionality. Tab metadata is processed locally and never logged or transmitted.
  • tabGroups: Used to organize tabs into groups, manage group colors and names, and support workspace features. All group data stays in your browser.
  • sidePanel: Used to display an in-browser panel for tab management and navigation. The panel runs locally with no external communication.
  • storage / unlimitedStorage: Used to save your preferences, workspaces, and extension state locally on your device via chrome.storage.local. SuperchargeNavigation also uses chrome.storage.sync when you enable cross-device sync — data flows through your own browser account's built-in sync, not our servers. All other extensions use local storage only.
  • tabCapture (SuperchargeAudio only): Opt-in, per-tab. Dormant until you click "Turn on capture" on a DRM-protected tab; then captures only that specific tab so its protected audio stream can be boosted and equalized. All processing happens locally on your device — audio is never recorded, stored, or transmitted. No microphone or camera access.
  • offscreen (SuperchargeAudio only): MV3 service workers cannot process audio directly, so when tab capture is enabled an offscreen document hosts the local audio-processing graph. Runs entirely on device with no external communication.
  • declarativeNetRequest: Used to apply content-blocking rules and to modify network request headers when needed for features like inline page previews. This is a privacy-preserving method — the browser applies the rules directly without the extension reading your network traffic.
  • scripting / activeTab: Used to inject lightweight content scripts that power features like content blocking, page overlays, mouse gestures, and visual indicators. These scripts run locally on the page and do not report data back to us.
  • alarms: Used to manage internal timers for scheduled tasks such as tab suspension timeouts and periodic data snapshots. Timers run locally.

4. Third-Party Services

We use trusted third-party providers to operate our business — not the extensions' logic.

  • Payment Processing: A specialized Merchant of Record handles all payments, tax compliance, and billing.
  • Email Services: Industry-standard email providers manage our mailing list.
  • Website Analytics: We use privacy-focused, cookie-free analytics on our website to understand traffic trends and page interactions (such as scroll depth and navigation patterns). No personal data is collected. All analytics data is anonymous and aggregated.

5. Data Retention

  • Browsing Data: We do not collect it, so there is nothing to retain.
  • Email Data: We retain your email until you unsubscribe or request deletion.
  • Subscription Data: License status is retained for the duration of an active subscription.

6. Children's Privacy

SuperchargeBrowser extensions are not intended for use by anyone under the age of 13. We do not knowingly collect personal information from children.

7. Changes to This Policy

We may update this policy to reflect changes in our products or legal requirements. Significant changes will be communicated via our extensions or website.

8. Contact Us

If you have any questions about this Privacy Policy, contact us at support@superchargebrowser.com.

See also: Security · Open Source Attributions