Site Spy Firefox

Site Spy

Track and monitor website changes with this web extension

Features & Capabilities

Site Spy — Track Website Changes Automatically

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 web dashboard — your choice. Manage watches from the browser toolbar, or from the full dashboard on any device.

Documentation & Guides

Features

  • Visual Diff Viewer — Side-by-side comparisons highlight every addition and removal
  • Automatic Monitoring — Set custom recheck intervals. Get browser notifications when content updates
  • Web Dashboard — Full dashboard at sitespy.app for managing watches, viewing diffs, and configuring notifications — works on any browser including mobile
  • Snapshot Timeline — Browse the complete change history of any tracked page. Compare any two versions
  • Full-Page & Element Tracking — Monitor an entire page or target a specific CSS selector for precision tracking
  • Smart Tags — Organize tracked sites with color-coded tags. Filter and find what matters fast
  • Dark & Light Themes — Clean interface that adapts to your preference

Two Ways to Track

  • Track Current Page — One click adds whatever page you're viewing
  • Track Any URL — Enter any public website URL to start monitoring

Great For

  • 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

How It Works

  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

🌐 sitespy.app | 📖 docs.sitespy.app

Track smarter. Stay informed.

User Growth & Download Statistics

Manifest V3 Add-on
By:
Vitaly Kuprin
Daily users:
23 1
Rating:
5.00
(1)
Version:
1.0.66 Last updated: 2026-03-24
Version code:
6193745
Creation date:
2025-11-10
Risk:
High risk impact Moderate risk likelihood
Permissions:
Host permissions:
  • http://*/*
  • https://*/*
Size:
14.22MB
Email:
su*****@sitespy.app
URLs:
Website ,Privacy policy
Full description:
See detailed description
Source:
Firefox Add-ons Store
Data ingested on:
2026-06-03
Compare stats and ranking:

Other platforms

Chrome
Site Spy (v1.0.62)
473 3.50 (6)

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.
Developed by:
Vitaly Kuprin
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/site-spy/
Email:
su*****@sitespy.app
Website:
https://sitespy.app

Publisher Change History

2026-03-05: vk*****@gmail.com to su*****@sitespy.app

Upgrade to see full email

Permission Change History

2026-02-17: Version 1.0.50 → 1.0.51
Add Permissions: scripting

Is Site Spy Safe?

Risk impact
Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Site Spy requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details
  • Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
  • Critical ****** ****** ** *** ********* ****** * *********** ******** **** ** ** *** ******* *** ****** **** **** *** ******* *****
  • Medium ******* ******* ************* ***** *** ** ******* *** **** ******* ****** ******** *******
Risk likelihood
Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Site Spy is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details
  • High This extension has low user count. Unpopular extensions may not be stable or safe.
  • Medium **** ********* *** ******* ** *** **** * ******* *** ******* *** *** ** ****** ** *****
  • Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
  • Good **** ********* *** **** **** *******
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Best Site Spy Alternatives

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