Site Spy by Vitaly Kuprin
Track and monitor website changes with this web extension
1 User1 User
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About this extension
Track and monitor website changes with this web extension
Site Spy - Track Website Changes Effortlessly
Never miss important updates on your favorite websites. Site Spy Monitor automatically detects and highlights changes on any webpage you're tracking.
Key Features:
✓ Dual Tracking Options:
• Track Current Page
- Leave the URL field empty and click the button to instantly add the page you're viewing
• Track Any URL
- Enter any website URL manually to monitor it
✓ Automatic Change Detection - Set custom check intervals and receive instant notifications when content changes
✓ Manual Change Detection
- Check any website for updates with a single click
✓ Visual Diff Viewer
- See exactly what changed with side-by-side comparisons highlighting additions and removals
✓ Snapshot Timeline
- Browse complete change history and compare any two historical versions
✓ Smart Tagging System
- Organize your tracked websites with customizable color-coded tags
✓ Flexible Notifications
- Choose between browser notifications, optional sound alerts, or silent monitoring
✓ Unlimited Monitoring
- Track as many websites as you need with no artificial limits
✓ Clean Interface
- Simple, intuitive design that stays out of your way
What Can Be Tracked:
• Any publicly accessible website using HTTP or HTTPS
• News sites, blogs, documentation pages
• Product pages, pricing pages, job listings
• API documentation, changelog pages
• Any web content that doesn't require authentication
What Cannot Be Tracked:
• Browser internal pages (chrome://, about:, edge:// URLs)
• Pages requiring login or authentication (you'll see an error in the extension)
• Local files (file:// URLs)
• Password-protected or private content
Perfect For:
• Monitoring competitor websites and pricing changes
• Tracking documentation updates and API changes
• Following news sites and blog posts
• Watching product availability and stock updates
• Keeping tabs on job postings and application deadlines
How It Works:
Note: The extension will show clear error messages if a page cannot be tracked due to browser restrictions or authentication requirements.
Stay informed. Track smarter. Monitor with confidence.
Site Spy - Track Website Changes Effortlessly
Never miss important updates on your favorite websites. Site Spy Monitor automatically detects and highlights changes on any webpage you're tracking.
Key Features:
✓ Dual Tracking Options:
• Track Current Page
- Leave the URL field empty and click the button to instantly add the page you're viewing
• Track Any URL
- Enter any website URL manually to monitor it
✓ Automatic Change Detection - Set custom check intervals and receive instant notifications when content changes
✓ Manual Change Detection
- Check any website for updates with a single click
✓ Visual Diff Viewer
- See exactly what changed with side-by-side comparisons highlighting additions and removals
✓ Snapshot Timeline
- Browse complete change history and compare any two historical versions
✓ Smart Tagging System
- Organize your tracked websites with customizable color-coded tags
✓ Flexible Notifications
- Choose between browser notifications, optional sound alerts, or silent monitoring
✓ Unlimited Monitoring
- Track as many websites as you need with no artificial limits
✓ Clean Interface
- Simple, intuitive design that stays out of your way
What Can Be Tracked:
• Any publicly accessible website using HTTP or HTTPS
• News sites, blogs, documentation pages
• Product pages, pricing pages, job listings
• API documentation, changelog pages
• Any web content that doesn't require authentication
What Cannot Be Tracked:
• Browser internal pages (chrome://, about:, edge:// URLs)
• Pages requiring login or authentication (you'll see an error in the extension)
• Local files (file:// URLs)
• Password-protected or private content
Perfect For:
• Monitoring competitor websites and pricing changes
• Tracking documentation updates and API changes
• Following news sites and blog posts
• Watching product availability and stock updates
• Keeping tabs on job postings and application deadlines
How It Works:
- Click the Site Spy Monitor icon in your browser toolbar
- To track the current page: Simply click "Track Current Page" button (leave URL field empty)
- If you're on a restricted page, you'll see a warning message
- To track any URL: Enter the website URL in the input field and click "Track Entered URL"
- Click the diff icon next to any tracked website to check for changes
- View detailed change comparisons with highlighted additions and removals
Note: The extension will show clear error messages if a page cannot be tracked due to browser restrictions or authentication requirements.
Stay informed. Track smarter. Monitor with confidence.
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Permissions and data
Required permissions:
- Display notifications to you
- Access browser tabs
Optional permissions:
- Access your data for all websites
Data collection:
- The developer says this extension doesn't require data collection.
More information
- Add-on Links
- Version
- 1.0.41
- Size
- 4.16 MB
- Last updated
- 3 days ago (Feb 3, 2026)
- Related Categories
- License
- All Rights Reserved
- Privacy Policy
- Read the privacy policy for this add-on
- Version History
- Add to collection