WHY BLOCK PRIVACY POLICY
Last updated: October 28, 2026

Applies to the Why Block browser extension for Firefox, Brave and other Chromium browsers.

Why Block works entirely inside your browser. Nothing is ever sent to the developer, and information goes to other services only when you ask.

NOTHING IS SENT TO US
Why Block has no servers, no accounts, no analytics, no crash reporting and no advertising. The developer never receives, sees or stores any information about you or the sites you visit.

WHAT STAYS IN YOUR BROWSER
- What the tab you're diagnosing loaded: which requests were blocked or failed, and signs of breakage on the page. This is kept in memory for that tab and cleared when you close it.
- Your settings, lists and API keys: stored in your browser's extension storage. Keys can be encrypted with a passkey or passphrase.

WHEN SOMETHING IS SENT TO A THIRD PARTY
Only when you've chosen to use a feature that needs it, and only to the services you've set up or switched on:
- Your DNS filter (such as Control D, NextDNS, AdGuard or Pi-hole), if you add it in Settings: the domain name being checked, to see whether and why it's blocked, and an allow rule when you click Allow. Automatic checks when the popup or report opens can be switched off in Settings, so checks happen only when you click.
- Domain safety sources (such as Google Safe Browsing or VirusTotal), when you open the safety dashboard for a domain: that domain name only. You choose which sources are switched on.
- Blocklists: whole lists are downloaded and searched inside your browser. No domain name is sent.

Only domain names are sent, never full web addresses or page content. Your own API key or password goes only to the service it belongs to. As with any connection, a service you contact can see your IP address, and it handles your request under its own privacy policy.

In Firefox, none of this happens until you agree in Firefox's built-in data-collection consent prompt, and you can withdraw consent at any time.

WHAT WE NEVER DO
- Collect, sell or share your information. We never have it.
- Use information for advertising, profiling or credit decisions.
- Load or run code from the internet. Everything the extension runs ships inside it.

REMOVING YOUR DATA
Uninstalling Why Block deletes everything it stored. You can also remove keys, lists and cached results in its Settings at any time.

CHANGES
If this policy changes, the new version will be posted at https://whyblock.me/privacy.html with a new date.