Take control of your data by telling websites not to sell or share your personal information.
What is Global Privacy Control?
Global Privacy Control (GPC) is a privacy standard that allows you to automatically signal your privacy preferences to websites. When enabled, it tells websites that you do not want your personal data to be sold or shared with third parties.
How It Works
- Automatically sends privacy signals to websites
- Respects your "Do Not Sell" preferences
- Works across all websites you visit
- Compliant with privacy regulations
- No manual intervention required
Supported Regulations
- California Consumer Privacy Act (CCPA)
- California Privacy Rights Act (CPRA)
- Colorado Privacy Act
- Virginia Consumer Data Protection Act
- Other state and international laws
Understanding Data Sales
When you visit websites, your personal information can be collected and sold to third parties for various purposes. This includes:
Types of Data That Can Be Sold
- Personal Information: Name, email, phone number, address
- Browsing History: Websites you visit and search queries
- Behavioral Data: How you interact with websites
- Device Information: Browser type, operating system, IP address
- Location Data: Geographic information about your visits
Who Buys This Data
- Advertising networks and agencies
- Data brokers and aggregators
- Marketing companies
- Research firms
- Third-party analytics services
How to Enable Privacy Preferences
Enable Global Privacy Control
Turn on the Global Privacy Control setting in your browser preferences. This will automatically signal your privacy preferences to all websites you visit.
Review Website Privacy Policies
Look for privacy policy links on websites and check if they respect Global Privacy Control signals. Many websites now have dedicated sections for privacy preferences.
Exercise Your Rights
If a website doesn't respect your preferences, you can contact them directly to request that your data not be sold or shared.
Your Privacy Rights
Right to Know
- What personal data is collected
- How your data is used
- Who your data is shared with
- Whether your data is sold
- Categories of third parties involved
Right to Opt-Out
- Opt-out of data sales
- Opt-out of data sharing
- Opt-out of targeted advertising
- Request data deletion
- Limit data processing
Best Practices for Privacy
Browser Settings
- Enable Global Privacy Control
- Use tracking protection features
- Clear cookies and site data regularly
- Use private browsing when appropriate
- Review and manage site permissions
Website Interactions
- Read privacy policies before sharing data
- Look for privacy preference centers
- Use "Do Not Sell" links when available
- Be selective about what information you share
- Report privacy violations when you encounter them
What to Expect
When you enable Global Privacy Control and other privacy preferences, you may notice:
Positive Changes
- Fewer targeted advertisements
- Reduced data collection
- More transparent privacy practices
- Better control over your information
- Compliance with privacy laws
Potential Limitations
- Some websites may not fully support GPC
- You may need to manually opt-out on some sites
- Some features may require data sharing
- Not all third-party services respect signals
- International websites may have different policies
Technical Implementation
Global Privacy Control works by sending a special HTTP header or JavaScript signal to websites indicating your privacy preferences. This signal tells websites that you have exercised your right to opt-out of data sales and sharing.
How the Signal Works
- HTTP Header: Sends a
Sec-GPC: 1
header with requests - JavaScript API: Sets
navigator.globalPrivacyControl = true
- Automatic: Works without any user interaction
- Standardized: Follows the Global Privacy Control specification
Websites that respect this standard will automatically honor your privacy preferences without requiring you to manually opt-out on each site.
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About the Author

I'm the CTO of Kahana, bringing a unique perspective from my management consulting experience at Clarkston Consulting and biomedical engineering background from Duke University. I'm focused on making the future of work more ergonomic through innovative technology solutions that prioritize user well-being and productivity.