# Startup Lock

> Password-locks the browser on startup. One password unlocks; a second, duress password silently wipes all browsing data.

Canonical page: [https://chrome-stats.com/d/startup-lock](https://chrome-stats.com/d/startup-lock)

## Overview

- **ID:** `startup-lock`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Max
- **Category:** privacy-security,tabs
- **Daily users:** 7
- **Weekly downloads:** 18
- **Version:** 1.0.1
- **Last updated:** 2026-07-14
- **First published:** 2026-07-11
- **Size:** 27 KB
- **Data as of:** 2026-09-06
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/startup-lock/)
- **Website:** [https://github.com/maca-sys/FirefoxStartupLock](https://github.com/maca-sys/FirefoxStartupLock)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/startup-lock/privacy/](https://addons.mozilla.org/firefox/addon/startup-lock/privacy/)

## Description

Startup Lock password-protects your browser. Every time Firefox starts, it locks all tabs behind a password screen — no browsing is possible until you enter the correct password.

It uses <strong>two</strong> passwords:
<ul><li><strong>Unlock password</strong> — unlocks normally and reopens the tabs you had open.</li><li><strong>Duress (wipe) password</strong> — a panic password. Entering it silently erases all browsing data (history, cookies, cache, saved logins, downloads, and more) and opens a single blank tab, with no warning and no visible difference from a normal unlock.</li></ul>
<strong>Other features</strong>
- Auto re-locks after a configurable idle timeout (default 10 minutes).
- Passwords are never stored in plain text — only salted PBKDF2 hashes, computed on your own device.
- No data collection, no analytics, no network requests. Everything stays on your computer.

<strong>Please note the limitations.</strong> Startup Lock is a deterrent and a panic-wipe tool, not full security. It does not stop Firefox Safe Mode, removing the add-on, using a different profile, or someone reading the profile folder directly on disk. For strong protection, combine it with a separate operating-system account and full-disk encryption.

## Rankings

- #39,940 — Overall
- #93 — start page
- #157 — password-protected

## Permissions and access

### Permissions

- `tabs`
- `storage`
- `idle`
- `browsingData`
- `<all_urls>`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** High risk likelihood

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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Source: [Chrome-Stats](https://chrome-stats.com/d/startup-lock)