# Site Spy

> Track and monitor website changes with this web extension

Canonical page: [https://chrome-stats.com/d/site-spy](https://chrome-stats.com/d/site-spy)

## Overview

- **ID:** `site-spy`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Vitaly Kuprin
- **Category:** web-development,privacy-security,alerts-updates
- **Daily users:** 21
- **Rating:** 5.00 / 5 (1 ratings)
- **Version:** 1.0.70
- **Last updated:** 2026-08-25
- **First published:** 2025-11-10
- **Size:** 19 MB
- **Data as of:** 2026-09-06
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/site-spy/)
- **Website:** [https://sitespy.app](https://sitespy.app/)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/site-spy/privacy/](https://addons.mozilla.org/firefox/addon/site-spy/privacy/)

## Description

<strong><a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/c98a3963f54b7b0e89c75604d60db6c3b97a01999e2f8a5364270dd8eb6a0774/https%3A//sitespy.app" rel="nofollow">Site Spy</a> — Track Website Changes Automatically</strong>

Know the moment any webpage changes. Site Spy monitors the sites you care about and shows you exactly what was added or removed — with visual diffs.

Use the extension or the <strong><a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/52357bae79c0ac4e72d892b95f59d30aa6a15243453e3fac5bbebae4b667da79/https%3A//sitespy.app/dashboard" rel="nofollow">web dashboard</a></strong> — your choice. Manage watches from the browser toolbar, or from the full dashboard on any device.

<strong><a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/6a3ccd3a08731daf2ff0c8292f3cf9b893947bd7d8704d08e892fd19508254f0/https%3A//docs.sitespy.app" rel="nofollow">Documentation &amp; Guides</a></strong>

<strong>Features</strong>
- <strong>Visual Diff Viewer</strong> — Side-by-side comparisons highlight every addition and removal
- <strong>Automatic Monitoring</strong> — Set custom recheck intervals. Get browser notifications when content updates
- <strong>Web Dashboard</strong> — Full dashboard at <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/c98a3963f54b7b0e89c75604d60db6c3b97a01999e2f8a5364270dd8eb6a0774/https%3A//sitespy.app" rel="nofollow">sitespy.app</a> for managing watches, viewing diffs, and configuring notifications — works on any browser including mobile
- <strong>Snapshot Timeline</strong> — Browse the complete change history of any tracked page. Compare any two versions
- <strong>Full-Page &amp; Element Tracking</strong> — Monitor an entire page or target a specific CSS selector for precision tracking
- <strong>Smart Tags</strong> — Organize tracked sites with color-coded tags. Filter and find what matters fast
- <strong>Dark &amp; Light Themes</strong> — Clean interface that adapts to your preference

<strong>Two Ways to Track</strong>
- <strong>Track Current Page</strong> — One click adds whatever page you're viewing
- <strong>Track Any URL</strong> — Enter any public website URL to start monitoring

<strong>Great For</strong>
- Price and stock monitoring
- Competitor website tracking
- Documentation and changelog updates
- News, blogs, and job postings
- Any public webpage you want to keep an eye on

<strong>How It Works</strong>
1. Click the Site Spy icon in your toolbar
2. Track the page you're on or enter any URL
3. Get notified when something changes
4. View exactly what changed with visual diffs

🌐 <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/c98a3963f54b7b0e89c75604d60db6c3b97a01999e2f8a5364270dd8eb6a0774/https%3A//sitespy.app" rel="nofollow">sitespy.app</a> | 📖 <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/6a3ccd3a08731daf2ff0c8292f3cf9b893947bd7d8704d08e892fd19508254f0/https%3A//docs.sitespy.app" rel="nofollow">docs.sitespy.app</a>

<strong>Track smarter. Stay informed.</strong>

## Rankings

- #24,116 — Overall
- #12 — ad spy
- #54 — site

## Permissions and access

### Permissions

- `tabs`
- `storage`
- `alarms`
- `notifications`
- `contextMenus`
- `scripting`

### Host permissions

- `http://*/*`
- `https://*/*`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** Moderate 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 was recently updated in the past month. New updates 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/site-spy)