Privacy Policy — Slumber

Zero data leaves your device

Slumber is a local-only extension. It has no server, makes no network requests, and never transmits any information about you, your tabs, or your browsing to anyone — not even to us.

Everything the extension stores lives entirely in Chrome's local storage on your computer. You can export or delete it at any time from Settings → Advanced → Privacy & Safety.

What Slumber never does

Collect analytics, telemetry, or usage statistics of any kind
Make any network requests — Slumber works 100% offline
Read, store, or transmit page content, form values, or passwords
Modify or redirect your URLs (except in opt-in Mode B, locally only)
Upload your browsing history, tab titles, or URLs to any server
Share any data with third parties — there are no third parties
Request the <all_urls> broad host permission
Use cookies, fingerprinting, or any cross-site tracking

What data is stored — and where

All data is stored locally in Chrome. Nothing is ever transmitted.

Chrome Sync storage (synced across your signed-in devices, never sent to us)

settings sync Your preferences: inactivity timeout, suspension mode, feature toggles.
tabExceptions sync Exact URLs you've marked "never suspend". Stored separately from settings to stay within Chrome's 8 KB per-key sync limit.
domainRules sync Per-domain timeout overrides you've configured in Site Rules.

Chrome Local storage (device-only, never synced, never transmitted)

tabState local Last-active timestamps and form-input flags per tab ID. Used only to decide when to suspend. Cleared when Chrome restarts.
stats local Suspension counts and estimated MB saved, today and all-time. Never includes URLs or titles.
detailedStats local Per-domain suspension counts for the Stats page. Stores only hostnames (e.g. "youtube.com"), never full URLs or page titles.
recentSuspensions local Ring buffer of the last 50 suspended tabs (URL, title, favicon URL, timestamp). Displayed in the popup and Options. You can clear it at any time.
donationPrompt local Tracks whether you've responded to the optional support prompt (accepted, dismissed, or "never ask"). Never sent anywhere.
ratingPromptShown local Boolean. Set to true after you've dismissed the one-time review prompt.
installDate local Timestamp of first popup open. Used only to delay the donation prompt until 7 days after install.
debugLog local Optional debug event log (off by default). Contains suspension/restore events with timestamps — no page content or URLs in the event payloads.

Permissions — plain English

Chrome shows these permissions on install. Here is exactly what each one is used for.

tabs	Read each tab's URL, active state, pinned state, and audio state to decide whether to suspend it. Slumber never reads page content through this permission.
storage	Save your settings locally and via Chrome sync. All data stays on your device(s).
alarms	Schedule a check every minute to see if any tabs have been inactive long enough to suspend. No network call is made during this check.
idle	Detect when your system becomes active again so tab timestamps are refreshed and recently-used tabs are not immediately re-suspended.
contextMenus	Add right-click menu options such as "Never suspend this tab" and "Suspend this tab now".
system.memory	Optionally read available system RAM. Used only when "Suspend aggressively when memory is low" is enabled in Settings. Not read otherwise.

Verifiable claims

Every claim on this page can be verified by inspecting the extension source code. Slumber has no build step — the code you read is exactly what runs in your browser. There are no minified bundles, no obfuscated scripts, and no external dependencies.

You can inspect the source at any time via chrome://extensions → Slumber → "Service worker" or by opening DevTools on the popup.

Contact

Questions about this policy or the extension? Email atifgodil7345@gmail.com.