OSINT

Privacy Protection: Browsers

A private browser is a web browser built to protect your privacy online. It blocks trackers, limits data collection, and prevents advertisers or third parties from following your activity. Unlike regular browsers, it reduces digital footprints by managing cookies, stopping invasive ads, and often offering extra tools like encryption or anonymous search.

Table Of Contents

  • The Role of Private Browsers
  • How Private Browser Differs from Regular Browsers
  • Key Features of Private Browsers
  • Exploring Popular Private Browsers
    • Brave Browser- Privacy with performance and rewards.
    • LibreWolf- Open-Source and telemetry-free.
    • Mullvad Browser- Anonymity-focused with VPN integration
  • Private Browsers vs. Regular Browsing Modes
  • Choosing the Right Private Browser
  • Conclusion

The Role of Private Browsers

In today’s digital world, privacy is more valuable than ever. Private browsers help protect users from unwanted tracking and surveillance while online.

Unlike regular browsers, they don’t just delete your history—they actively reduce your digital footprint and give you control over your online activity.

Key benefits of private browsers include:

  • Reduced Tracking: Block trackers, fingerprinting scripts, and intrusive ads that follow your online behavior.
  • Data Control: Limit the storage of cookies, form data, and browsing history.
  • Encrypted Connections: Ensure secure connections to websites for safer browsing.
  • Permission Management: Control what websites can access, such as location, camera, or microphone.
  • Device Safety: Especially useful on shared devices or public computers to protect personal information.

Modern private browsers like Brave, LibreWolf, and Mullvad take privacy even further, offering additional tools and enhanced protections to maintain anonymity and prevent profiling.

Important Note: Private browsers do not make you fully anonymous. Your Internet Service Provider (ISP) and the websites you visit can still monitor certain aspects of your activity. For stronger privacy and anonymity, it’s recommended to use private browsers alongside additional tools like:

  • VPNs (Virtual Private Networks): Hide your IP address and encrypt your internet traffic.
  • Tor Network: Routes your connection through multiple servers to make it difficult to trace your activity.

How Private Browser Differs from Regular Browsers

At first glance, private browsers may look like everyday browsers like Chrome, Edge, or Firefox. However, their approach to privacy and data management is fundamentally different. Regular browsers prioritize convenience, performance, and compatibility, often allowing third-party trackers, storing browsing history, and sending telemetry data back to developers. Even features like “incognito” or “private mode” only hide history locally—they don’t prevent websites or ISPs from tracking your activity.

Private browsers, on the other hand, are built specifically to protect your online privacy. They actively block trackers, ads, and fingerprinting scripts, limit data collection, and give you control over cookies and website permissions. Some even include advanced tools like built-in VPNs or Tor integration, making it much harder for third parties to monitor your online behaviour.

Key Differences at a Glance:

  • Tracking & Ads:
    • Regular Browsers: Allow most ads and trackers by default.
    • Private Browsers: Block trackers, ads, and fingerprinting scripts automatically.
  • Data Storage:
    • Regular Browsers: Store browsing history, cookies, and form data.
    • Private Browsers: Minimize or isolate stored data to reduce your digital footprint.
  • Telemetry:
    • Regular Browsers: Often send usage data to developers.
    • Private Browsers: Limit or eliminate telemetry to protect your privacy.
  • Privacy Tools:
    • Regular Browsers: Offer basic “incognito” mode that hides local history only.
    • Private Browsers: Include VPNs, Tor integration, and enhanced cookie/permission management.

In short: Private browsers go beyond hiding history—they actively protect your data, reduce tracking, and give you greater control over your online presence, unlike regular browsers that mainly focus on convenience.

Key Features of Private Browsers

Private browsers are designed to go beyond standard browsing by offering a range of tools and features that prioritize user privacy and security. While every private browser may have its unique strengths, most share core functionalities that help protect your online activity and digital footprint.

These features ensure that users can browse the web with confidence, reduce exposure to tracking, and maintain control over their personal information. They also provide added layers of protection that are not available in standard browsers.

  • Tracker and Ad Blocking: Prevents third-party trackers and intrusive ads from following your online behaviour.
  • Fingerprinting Protection: Reduces the ability of websites to uniquely identify your device and browser setup.
  • Cookie and Data Management: Limits, isolates, or deletes cookies and form data to prevent profiling.
  • Encrypted Connections (HTTPS): Ensures secure communication between your browser and websites.
  • Permission Controls: Lets users manage what websites can access, such as location, camera, or microphone.
  • Built-in Privacy Tools: Includes VPN integration, Tor support, or sandboxed browsing sessions for added anonymity.
  • Minimal Telemetry: Reduces or eliminates sending usage data back to developers or companies.

In short: These features work together to provide a safer, more private browsing experience, giving users control over their data and helping prevent advertisers, trackers, or malicious entities from monitoring online activity.

Exploring Popular Private Browsers

With increasing concerns over online tracking and data collection, several private browsers have emerged to help users protect their privacy. Each offers unique features, catering to different levels of user experience and security needs. Among the most notable are Brave, LibreWolf, and Mullvad Browser.

Brave Browser

Brave is a Chromium-based browser that emphasizes privacy without compromising speed. It blocks ads and trackers by default, reducing your digital footprint while improving browsing performance.

Ideal For: Everyday users seeking a fast, user-friendly browser with strong privacy by default.

https://brave.com/

The Brave browser welcome screen highlights its promise of “Privacy. By Default.” It showcases Brave’s built-in privacy and security, urging users to set it as their default browser for safe, private, and ad-free browsing.

The Brave browser Shields settings page allows users to customize privacy and security controls. Key features include:

  • Trackers & ads blocking – set to Aggressive for maximum protection.
  • Upgrade connections to HTTPS – set to Strict for secure browsing.
  • Block fingerprinting – prevents websites from tracking unique device details.
  • Block cookies – set to Block third-party cookies to enhance privacy.
  • Additional options – manage scripts, content filtering, and social media blocking.

Brave Shields provide stronger privacy by default, giving users full control over ads, trackers, and cookies for a safer and more private browsing experience.

The Brave browser Shields settings page gives users control over online privacy by blocking trackers, ads, cookies, and fingerprinting. In this view, the Content Filtering option is highlighted, which allows users to enable custom filters for blocking regional and language-specific trackers and online annoyances.

Key settings include:

  • Trackers & ads blocking – set to Standard.
  • Upgrade connections to HTTPS – set to Standard.
  • Block fingerprinting – enabled for added security.
  • Block cookies – set to Block third-party cookies.
  • Content filtering – provides advanced customization for stronger privacy.
  • Social media blocking – manage Facebook logins, X (formerly Twitter) embeds, and LinkedIn posts for additional privacy control.

This feature ensures that Brave users can go beyond default protections and create a more personalized, secure browsing experience.

The interface demonstrates Brave browser’s advanced Content Filters settings page, giving users full control over which content is blocked during browsing.

Key features include:

  • Community filter lists: Users can choose from popular lists like EasyList Cookie and Fanboy’s Mobile Notifications to block ads, trackers, and other annoyances.
  • Full list access: The “Show full list” option displays all available filter lists.
  • Updates: The “Update lists” button refreshes filter rules with the latest community updates.
  • Custom filters: Users can add their own filter lists via URL or create unique rules using Adblock filter syntax.
  • Developer mode: Advanced users can enable this toggle for deeper filter and script management.

Overall, the page balances easy selection of common filters with powerful customization, enhancing privacy and creating a smoother, more controlled browsing experience.

The settings page presents Brave browser’s Content Filters settings, focusing on the “YouTube Anti-Shorts” filter.

The “YouTube Anti-Shorts” option is enabled, allowing Brave to block or hide YouTube Shorts content for a more controlled viewing experience.

Other available filters include cookie blockers, social ad filters, notification blockers, and protections against various online annoyances, all fully customizable to suit individual privacy preferences.

Moreover, using these filters helps users reduce unwanted content and distractions, tailoring Brave to block specific website features—such as hiding YouTube Shorts in recommendations or feeds.

The panel illustrates Brave browser’s privacy controls for automatically deleting browsing data on exit.

Then, in the “Privacy and security” tab, users can select “Delete browsing data” to remove history, cookies, cached files, chat records, passwords, and autofill information each time the browser closes.

The settings window also allows users to customize which types of data are deleted, with an “On exit” tab for enabling automatic cleanup upon shutdown.

These features help users protect their privacy by preventing sensitive information and tracking data from persisting between browsing sessions.

The screen demonstrates Security section within Brave browser’s Privacy and Security settings.

Key features include:

  • Safe Browsing: Protects users from dangerous websites, malware, and suspicious downloads by providing timely warnings.
  • Additional security controls: Allows users to manage site safety and configure advanced security features beyond basic data cleanup.

This section helps users maintain a safer browsing experience, offering strong protection while navigating the web.

The interface displays Brave browser’s Security settings, focusing on Safe Browsing and secure DNS.

Brave Browser Setting:

  • Safe Browsing: With “Standard protection” turned on, Brave warns you about unsafe websites, downloads, and extensions.
  • Secure DNS: Turning on “Use secure DNS” keeps your browsing private by hiding the websites you visit from others.
  • Choose DNS provider: You can pick services like Cloudflare (1.1.1.1) to make browsing faster and more secure.

These settings help you stay safe online and protect your privacy while browsing.

The view demonstrates Brave browser’s menu, highlighting the “New private window with Tor” option.

Brave browser’s menu

  • Tor private browsing: Selecting this option lets users browse anonymously via the Tor network, which sends internet traffic through multiple relays to protect privacy and prevent tracking.
  • Keyboard shortcut: Users can quickly open a Tor-enabled private window using “Shift + Alt + N”.
  • Enhanced privacy: This feature complements regular private windows, giving users an extra layer of anonymity for stronger online privacy.

Brave private window connected to Tor ensures anonymous browsing, protects sensitive searches, and blocks trackers for enhanced privacy.

If you want to hide specific sections of a website, Brave makes it simple and straightforward to do so. Users can easily customize which content is visible, allowing for a more controlled and personalized browsing experience.

Users can right-click on any element of a webpage and select “Block Element” to hide the highlighted content. This feature allows for precise control over which parts of a site are visible, making browsing cleaner and more personalized.

Then, click the “Block Element” button as shown in the image below. This will hide the selected content from the webpage, giving you a cleaner view and more control over what appears while browsing.

As you can see, the highlighted content has now disappeared from the webpage, reflecting the changes made using the “Block Element” feature.

Brave browser social media blocking settings with toggles for Facebook, X (Twitter), and LinkedIn, controlling embedded content (posts or tweets shown directly on websites) to protect privacy and reduce tracking.

Brave browser Shields panel for a website showing 1 Blocked trackers and ad, with active privacy protections like HTTPS-only connections, fingerprinting protection, and third-party cookie blocking.

LibreWolf

LibreWolf is a fork of Firefox designed for users who value transparency and control over privacy. It removes telemetry and unnecessary features, offering a lean, privacy-focused experience.

Ideal For: Open-source enthusiasts and advanced users who prioritize maximum privacy.

https://librewolf.net/

Homepage of LibreWolf, an open-source Firefox-based browser, showing logo, description, and access to source code and docs.

LibreWolf browser features highlighting privacy and security: no telemetry, private search, preinstalled uBlock Origin, enhanced privacy, fast updates, and open-source development.

The settings page shows LibreWolf browser’s privacy settings, highlighting options for automatic data deletion to enhance privacy.

  • Automatic cleanup: Cookies, site data, and browsing history are cleared whenever LibreWolf is closed, preventing tracking and leaving no traces of online activity.
  • Enhanced privacy features: Additional toggles include alerts for breached passwords and options to refuse data sharing or sale, reinforcing user protection.
  • Default protection: These settings ensure a more private browsing experience by default, keeping user activity secure between sessions.

The settings page shows LibreWolf’s “Enable Container Tabs” feature, which allows users to group tabs into separate containers for enhanced privacy and account management.

What Container Tabs Do

  • Isolated browsing: Each container functions like a separate browser, keeping cookies, login sessions, and local data separate.
  • Multiple accounts: Users can sign in to multiple accounts on the same website simultaneously by opening different container tabs.
  • Limited tracking: Tracking and security threats are confined to their container, reducing cross-site tracking and minimizing data leaks between tabs.

Why It Matters for Privacy

  • Segregated activity: Work, personal, shopping, and banking activities remain separate, lowering the risk of fingerprinting and unwanted data sharing.
  • Extension support: Container Tabs allow extensions that require separate cookie stores or identities to work reliably.
  • Granular control: Users can assign specific sites to always open in a designated container, improving both privacy and organization.

Enabling Container Tabs in LibreWolf provides advanced multi-account support, fortified isolation against tracking, and a safer, more flexible browsing experience.

LibreWolf Container Tabs management screen showing separate containers for Personal, Work, Banking, and Shopping with isolated cookies and login sessions to enhance privacy.

LibreWolf’s Privacy & Security settings, highlighting controls designed to protect sensitive data.

  • Prevent data sharing: The browser is set to stop websites from selling or sharing user information, maintaining privacy by default.
  • Automatic data deletion: Cookies and site data are cleared whenever LibreWolf is closed, ensuring tracking information is not retained between sessions.
  • Primary password protection: A master password is enabled to safeguard saved passwords, requiring authentication before access.

These settings demonstrate LibreWolf’s commitment to privacy and security, keeping browsing traces wiped and login credentials protected with an additional password layer.

LibreWolf Security options illustrating OCSP certificate checks, HTTPS-Only Mode, trusted root certificates, and DNS over HTTPS for enhanced online security.

Mullvad Browser

Mullvad Browser is developed with privacy and anonymity in mind, working seamlessly with Mullvad VPN. It incorporates features inspired by Tor Browser, providing strong protections against tracking and fingerprinting.

Ideal For: Users seeking advanced anonymity and security, especially when paired with Mullvad VPN.

https://mullvad.net/en/download/browser/windows

Mullvad Browser start page highlighting privacy-focused design, collaboration with Tor Project and Mullvad VPN, and links for learning about secure browsing.

The panel highlights the Mullvad Browser Settings page, emphasizing privacy and security best practices.

  • WebRTC: The setting allows WebRTC, but users are prompted to review a guide if a WebRTC leak is detected, as this can potentially reveal the real IP address even when using privacy tools.
  • Privacy recommendations:

    • Install uBlock Origin: Suggests adding this extension to block ads and trackers efficiently.
    • Use HTTPS-only mode: Encourages enabling HTTPS-only mode to ensure all connections are encrypted and prevent insecure HTTP traffic.
    • Change your default search engine: Advises selecting a privacy-respecting search engine for safer searches.

These settings and recommendations help users maximize privacy and security while browsing with Mullvad Browser.

The settings panel shows Mullvad Browser’s Security settings, illustrating how essential security features are configured for safe browsing.

  • Security Level: Set to Standard, enabling all browser and website features while balancing usability with typical protections against attacks and leaks.
  • Certificate validation: OCSP checks are active to ensure website security certificates are valid and not revoked, protecting users from potential fraud.
  • HTTPS-Only Mode: Enabled for all windows, upgrading connections to encrypted HTTPS wherever possible and warning users if a site can only be reached via unsafe HTTP.

These settings provide secure, encrypted browsing and verify site authenticity by default.

Mullvad Browser DNS over HTTPS settings with Max Protection on, keeping all website visits private and secure.

Private Browsers vs. Regular Browsing Modes

Many users assume that switching to “incognito” or “private mode” in standard browsers like Chrome or Firefox provides full privacy. In reality, these modes only prevent your browsing history and cookies from being stored locally. They do not block trackers, fingerprinting, or data collection by websites, advertisers, or your Internet Service Provider (ISP).

Private browsers, on the other hand, are built from the ground up to protect your privacy online. They actively block trackers, ads, and fingerprinting scripts, limit telemetry, and offer advanced privacy tools such as VPNs or Tor integration. In essence, private browsers do far more than just hiding your local history—they reduce your digital footprint and help prevent online tracking.

Key Differences:

  • Scope of Privacy:
    • Regular Browsers (Incognito Mode): Only hides history and cookies locally.
    • Private Browsers: Blocks trackers, ads, and fingerprinting, limiting data collection.
  • Tracking Protection:
    • Regular Browsers: Websites and ISPs can still track your activity.
    • Private Browsers: Actively prevent tracking by third parties.
  • Data Handling:
    • Regular Browsers: Minimal protection against telemetry or profiling.
    • Private Browsers: Limit or eliminate telemetry and provide user control over permissions.
  • Advanced Tools:
    • Regular Browsers: No integrated VPN or Tor support.
    • Private Browsers: Often include VPNs, Tor, and other privacy-focused features.

In short: While regular “private” modes provide limited local privacy, true protection requires a private browser, which actively safeguards your online activity and minimizes exposure to tracking and profiling.

Choosing the Right Private Browser

Choosing the right private browser depends on your specific privacy needs, technical comfort level, and browsing habits. While all private browsers aim to protect your data, they differ in features, usability, and focus—some prioritize speed and convenience, while others focus on maximum anonymity and advanced security.

Factors to Consider:

  • Ease of Use: Is the browser user-friendly for beginners, or does it require technical knowledge?
  • Privacy & Security Features: Does it block trackers, ads, and fingerprinting? Does it include built-in VPN or Tor support?
  • Transparency: Is it open-source, allowing the community to verify privacy claims?
  • Anonymity Level: Does it provide basic privacy protections, or advanced anonymity like Tor routing?
  • Performance: Does it balance privacy with fast and smooth browsing?
  • Compatibility: Can it support extensions and tools you rely on?

Examples:

  • Brave: Best for everyday users who want a fast, convenient browser with strong default privacy.
  • LibreWolf: Ideal for open-source enthusiasts who want maximum transparency and control.
  • Mullvad Browser: Suited for users who prioritize advanced anonymity and privacy, especially when paired with Mullvad VPN.

In short: Selecting the right private browser requires understanding your privacy priorities and choosing a browser that aligns with your needs, whether it’s convenience, transparency, or maximum anonymity.

Conclusion

In an age where online tracking, data collection, and targeted advertising are increasingly pervasive, protecting your digital privacy has never been more important. Private browsers offer a practical and effective way to regain control over your online presence. By blocking trackers, limiting data collection, and giving you control over permissions, they help reduce your digital footprint and enhance your security.

Whether you choose Brave for speed and convenience, LibreWolf for open-source transparency, or Mullvad Browser for advanced anonymity, each browser provides unique tools to safeguard your online activity. For even stronger privacy, consider combining private browsers with complementary tools such as VPNs or the Tor network.

Ultimately, using a private browser is not just about hiding your browsing history—it’s about taking charge of your digital life, protecting sensitive information, and browsing the internet with confidence and peace of mind.

To learn more on Open-Source Intelligence (OSINT). Follow this Link.

Author: Muskan Sen is a Researcher and Technical Writer specializing in Information Security. Follow her – Linkedin.