🥷 Browser Ninja - Privacy Policy

Last Updated: May 17, 2026

Browser Ninja (“the Extension”) is a privacy-first, local-first browser extension. The extension is designed so that user data remains on the user’s device unless the user explicitly takes action to share it.

1. What data the Extension accesses

• tabs (open tabs’ URLs and titles): required to group and display your open tabs in the dashboard.
• favicon: used to display local favicons via the Chrome _favicon API.
• storage: the extension uses chrome.storage.local to persist settings, cached background image metadata, notes, and lightweight usage statistics.

2. Data storage and transmission

• All user data (tabs metadata, Ninja Notes, UI settings, gradient intensity, selected background mode, and the cached background image URL for the current day) is stored locally using chrome.storage.local.
• The extension does not send browsing history, notes, or personal data to any external servers or third-party analytics services.

3. Remote resources

• The extension does fetch remote image assets for optional background categories (images are fetched over HTTPS from public image providers such as https://picsum.photos/). These network requests are strictly for image content only; no remote JavaScript, configuration, or executable code is downloaded or evaluated at runtime.
• Fonts are bundled locally to avoid external font requests.
• The extension does not perform any remote code execution. There is no use of eval(), Function() constructors, or dynamic script imports from remote domains.

If you prefer to avoid remote image requests, you can switch the background mode to the local “Zen” gradient or disable atmospheric backgrounds in the extension settings.

4. Behavioral metrics and local statistics

• The extension records minimal, purely local statistics (for example: tabs opened/closed counts, simple activity counters used for the local “Ninja Rank” and ordering). These metrics are used only to improve the local UX (sorting, simple gamification) and are not transmitted off-device.

5. Ninja Notes

• Text you type into Ninja Notes is saved locally in chrome.storage.local and never transmitted by the extension.

6. Permissions explained

• tabs: Required to read open tab metadata so the dashboard can group and display your tabs.
• activeTab: Allows focusing/restoring the active tab from the dashboard UI.
• storage: Used to persist user settings, notes, cached daily background URL, and small usage counters.
• favicon: Used to construct privacy-preserving local favicon URLs (the extension uses the local _favicon endpoint; no external favicon service is called).

7. Data retention and removal

• Data stored by the extension persists until you clear it, change settings, or uninstall the extension.
• To remove all stored data, uninstall the extension and clear any extension-specific storage from Chrome’s extension settings.

8. Contact & changes to this policy

• If this policy changes, the “Last Updated” date will be revised. Because the extension does not collect telemetry by default, users should review this file periodically when concerned about updates.
• For questions or privacy concerns, please open an issue at: https://github.com/modib/browser-ninja/issues

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This policy reflects the extension as of the “Last Updated” date above.

Last modified: May 27, 2026