Browser extension · Legal

Browser Extension Privacy Policy

Applies to the Lummi browser extension · Effective July 1, 2026 · Last updated July 1, 2026

1. What this policy covers

This policy is for the Lummi — Focus & De-Recommend browser extension for Chrome, Microsoft Edge, Brave, and Firefox. The extension strips YouTube's recommendation surfaces, hard-blocks distracting sites, and runs a focus timer that keeps them shut. This is a separate product from the Lummi iOS app and has its own, separate privacy policy; nothing here refers to the iOS app.

2. The short answer: we collect nothing

The extension has no backend. It never creates an account, never phones home, and includes no analytics, telemetry, advertising, or third-party trackers of any kind. Everything it does happens locally, inside your browser, on your computer. There is no data for us to see, because none of it ever leaves your device.

3. What the extension stores on your device

To work, the extension saves a small amount of data using your browser's local extension storage (chrome.storage.local / browser.storage.local). This lives on your device only. It is not synced to us or to your browser account. It includes:

• Your settings — which YouTube surfaces to hide, which sites to block, focus options (timer length, strict mode, block-YouTube-during-focus, mute-notifications), and any custom block list you add.
• Focus-session state — whether a focus session is currently running and when it ends, so the timer survives the browser closing the extension's background worker.
• Completed-session history — a record of focus sessions you finished, used to draw your dashboard heatmap, streaks, and totals. This is a count of sessions and their times; it contains no record of the sites you visited or blocked.

You can view, export, import, or clear all of this at any time in the extension's Settings → Your data. Uninstalling the extension deletes it.

4. What the extension does not do

• It does not collect or transmit your browsing history, the pages you visit, the content of those pages, form inputs, keystrokes, or your YouTube watch history or account.
• It does not send any data to us or to any third party — there is no server to send it to.
• It does not use cookies, analytics, fingerprinting, or advertising SDKs.
• It does not require an account, email address, or sign-in.
• It does not sell, rent, or share personal information, because it never collects any.

5. Permissions, and why the extension asks for them

Browsers require an extension to declare the capabilities it uses. Here is every permission Lummi requests and exactly what it is for. None of them are used to gather information about you.

• storage — to save the settings and session history described in section 3 locally on your device.
• alarms — to keep the focus timer accurate even when the browser has shut down the extension's background worker.
• notifications — to show you a single notification when a focus session finishes.
• Access to the pages you visit (<all_urls> content scripts) — this is what lets Lummi actually block a distracting site (by redirecting the tab to its own block screen), mute web notifications while you are in a focus session, and hide YouTube's recommendation surfaces. To do this, the extension looks at the address of the page (its hostname) to decide whether it is on your block list, and it edits the page you are on. It reads this only on your device and only to make that decision; it does not read, store, or send the contents of the pages you visit.

6. YouTube

On YouTube, the extension applies styling and small script changes that hide recommendation surfaces — the home feed, related / "up next", end-screen cards, Shorts, Explore, and optionally comments — and can redirect the home page to your Subscriptions. This all happens by modifying the page in your browser. The extension does not read your watch history, your YouTube account, your searches, or which videos you play, and it sends nothing about your YouTube use anywhere.

7. Where the extension is distributed

Lummi is distributed through the Chrome Web Store, Microsoft Edge Add-ons, and Firefox Add-ons (AMO). When you install or update the extension, those platforms operate under their own privacy policies and may record download and update statistics. That activity is between you and the store; the extension itself still sends us nothing.

8. Children's privacy

The extension is a general-purpose productivity tool, is not directed to children under 13, and collects no personal information from anyone, including children.

9. Changes to this policy

If the extension's data practices ever change, we will update this page and revise the "Last updated" date above. If a future version were ever to collect or transmit any data, we would say so here, clearly, before it did.

10. Contact

Questions about this policy or the extension? Email hello@ilummi.app.