I need a browser that blocks fingerprinting and does not send telemetry data.

Mullvad Browser is probably the closest match. It is designed to make users’ fingerprints similar, and telemetry/crash reporting are disabled at compile time.

• Mullvad Browser — strongest fit; no telemetry, strong anti-fingerprinting.
• LibreWolf — also disables telemetry and enables Firefox’s Resist Fingerprinting protections.
• Tor Browser — consider this if you also want anonymity through the Tor network; LibreWolf itself recommends Tor Browser for that use case.

For ordinary browsing, I’d choose Mullvad Browser and avoid piling on extensions, since unusual configurations can themselves make you more fingerprintable.

If you need a browser that completely strips out telemetry and actively neutralizes browser fingerprinting without forcing you through a complex configuration, you have a few top-tier open-source options.

• Mullvad Browser
  • The lowdown: Developed in collaboration with the creators of Tor Browser (The Tor Project) and the privacy company Mullvad VPN, this browser is specifically engineered for Tor-grade anti-fingerprinting protections, but designed to run over your normal internet connection at full speed.
  • Privacy credentials: It features zero telemetry, starts in private-browsing mode by default (wiping cookies/cache on close), uses letterboxing to normalize your window size against fingerprinting, and comes with uBlock Origin pre-installed.
  • Where to get it: Download it directly from the Mullvad Browser official site.
• LibreWolf
  • The lowdown: A completely independent, open-source fork of Firefox. While stock Firefox still contains Mozilla telemetry and corporate feature integrations, LibreWolf strips all of that out at the source code/binary level.
  • Privacy credentials: It ships with resistFingerprinting enabled out of the box, enforces strict content isolation, removes all telemetry and data collection, and includes uBlock Origin pre-configured. It behaves like a hardened, out-of-the-box Firefox meant for daily driving.
  • Where to get it: Grab the installer from the LibreWolf official website.
• Ungoogled-Chromium
  • The lowdown: If you prefer the Chromium engine (for extension compatibility or web app performance) but hate Google's data collection, this is a literal surgical removal of all Google web services, background telemetry, and tracker hooks from the Chromium source code.
  • Privacy credentials: It does not send crash reports or telemetry to Google, strips session-logging features, and disables all "phone-home" behaviors. Keep in mind it is a bit more raw; you have to manually install extensions like uBlock Origin yourself, and updates require manual management or third-party packaging.
  • Where to get it: Find community binaries and source info on the Ungoogled-Chromium GitHub Project.

Would you prefer a Firefox-based option (like Mullvad or LibreWolf) or a Chromium-based option? Let me know if you need help deciding based on your operating system or extension needs.

To block fingerprinting and completely eliminate telemetry, you want a browser designed from the ground up for privacy rather than a mainstream browser with "private mode" turned on.

The top options that meet these exact requirements approach anti-fingerprinting and zero-telemetry differently:

Top Recommendations

• Mullvad Browser — Best for strict anti-fingerprinting on the normal web.
  • How it works : Developed in collaboration with the Tor Project , it brings Tor Browser’s elite anti-fingerprinting protections to regular internet usage (without routing traffic through the Tor network).
  • Telemetry/Data : Zero telemetry, no account system, and it operates in private-by-default mode (clearing cookies and history on close).
  • Pros/Cons : Excellent at making your browser look identical to every other Mullvad user, but it doesn't save persistent session data/history by design.
• LibreWolf — Best independent, customizable daily-driver Firefox fork.
  • How it works : A community-driven fork of Firefox completely stripped of all Mozilla telemetry, data collection, sponsored content, and Pocket integration.
  • Anti-fingerprinting : Includes built-in letterboxing (resizing canvas padding to prevent window-size tracking) and strong tracking/fingerprinting protections out of the box.
  • Pros/Cons : Retains normal browsing history and extension support (unlike Mullvad), but you have to manage your own cookie/session storage if you want it wiped.
• Tor Browser — Best for absolute anonymity.
  • How it works : The gold standard for masking both your fingerprint and your network identity/IP address by routing traffic through the Tor network.
  • Telemetry/Data : Zero telemetry, maximum script blocking, and forced uniform window sizing.
  • Pros/Cons : Incomparable privacy, but can be slow and trigger captchas on regular websites because of its onion-routing exit nodes.
• Brave Browser — Best mainstream/Chromium alternative.
  • How it works : Aggressively blocks trackers, ads, and fingerprinting vectors by default using its built-in Shields.
  • Telemetry/Data : Strips out upstream Google telemetry, though it does have optional internal telemetry/crypto features that can be fully disabled in settings.
  • Pros/Cons : High performance and compatibility as a Chromium browser, though less uniform in its fingerprint defense compared to Mullvad or Tor.

Are you looking for a browser for daily continuous use (saving passwords and history) or a strict session-based browser that wipes everything when closed?

If your two requirements are strong anti-fingerprinting and no browser telemetry, my top choices are:

1. Mullvad Browser — best overall

• Uses the same anti-fingerprinting approach as Tor Browser and tries to make users look alike.
• Telemetry is removed from the browser.
• Includes uBlock Origin and private browsing by default.
• You can use it without Mullvad VPN, although a VPN is useful if you also want to hide your IP address.
• My recommendation if you want a normal-feeling browser without browser telemetry.

2. Tor Browser — strongest anonymity

• Specifically designed to resist fingerprinting by making Tor Browser users look similar.
• Routes traffic through Tor, hiding your IP from websites and your browsing destinations from your ISP/local network.
• The Tor Project says it doesn't keep logs that identify individual users, although it collects limited privacy-preserving network measurements.
• Best choice if anonymity matters more than speed/convenience.

3. LibreWolf — best conventional Firefox alternative

• Removes Firefox telemetry and data collection.
• Enables strong anti-fingerprinting protections such as Resist Fingerprinting and letterboxing.
• More conventional than Tor Browser and generally less disruptive to websites.
• Good choice if you don't want to use Tor.

What I'd choose

Mullvad Browser is probably the closest match to exactly what you asked for: anti-fingerprinting + no browser telemetry, without forcing all traffic through Tor.

If you want maximum anonymity, use Tor Browser instead.

One important distinction: "no telemetry" doesn't mean "no network connections." Mullvad Browser still makes necessary connections for browser/extension updates, DoH, certificates, and filter lists; Mullvad says it doesn't collect personal information through those requests.

If your priorities are (1) strong anti-fingerprinting and (2) no telemetry/phone-home data, these are the browsers I would look at:

My recommendation

• For everyday browsing: use Mullvad Browser. It is probably the closest match to your requirements: anti-fingerprinting is the main design goal, and it removes telemetry.
• For a normal-feeling Firefox experience: use LibreWolf. It removes Firefox telemetry and applies privacy hardening out of the box.
• For maximum anonymity: use Tor Browser (accepting that some sites will challenge/block it).

A few privacy tips regardless of browser:

• Avoid installing many extensions; they can make your fingerprint more unique.
• Do not customize anti-fingerprint browsers heavily (fonts, window sizes, unusual settings can make you stand out).
• Disable browser sync unless you understand what data is uploaded.
• Use a reputable VPN if hiding your IP address is part of your goal; a browser alone does not hide your network identity.

If you tell me your OS (Windows/macOS/Linux/Android/iOS) and whether you need Chrome-extension compatibility, I can narrow it down to one choice.

To completely eliminate telemetry and protect against browser fingerprinting, you need a browser that either standardizes your digital footprint to look identical to everyone else or randomizes your attributes.

The top options designed specifically for this purpose include:

1. Mullvad Browser — Best for strict anti-fingerprinting without the Tor network
   • Developed in collaboration with the Tor Project , it brings Tor’s legendary anti-fingerprinting and standardization protections to a normal, high-speed connection (optimized for use with a VPN, though a VPN isn't required).
   • It has zero telemetry , no update bloat, and forces a generic, uniform profile so your browser blends in with every other Mullvad user.
   • Get it at the Mullvad Browser Official Website.
2. Tor Browser — Best for maximum anonymity
   • The gold standard for masking your identity. It routes your traffic through the Tor network and enforces strict fingerprint blocking by making every user look completely identical (same window size constraints, blocked canvas data, disabled APIs).
   • Zero telemetry, but can be slower due to onion routing, and some aggressive security settings may break interactive web apps.
   • Download it via the Tor Project.
3. LibreWolf — Best as a daily-driver hardened Firefox
   • An independent, community-driven fork of Firefox that completely strips out all Mozilla telemetry, crash reporters, and recommended add-ons.
   • It comes pre-hardened with built-in enhanced tracking protection, resistFingerprinting options, and uBlock Origin.
   • Check it out at LibreWolf.
4. Brave Browser — Best for usability and dynamic fingerprint randomization
   • Unlike Mullvad/Tor which standardize data, Brave actively randomizes fingerprinting attributes per-session or per-site. It also strips out Chromium's built-in telemetry and includes powerful native ad/tracker blocking (Brave Shields).
   • It is the most seamless "drop-in" replacement for Chrome without sacrificing site compatibility.
   • Available at Brave.

Quick Comparison of Approaches

• Mullvad / Tor: Make you look like a clone of everyone else using the browser (Standardization).
• Brave: Changes your device signature dynamically so trackers can't pin down a permanent ID (Randomization).
• LibreWolf: Total removal of telemetry with deep configuration controls, though you must be mindful of how you tweak it.

To help narrow down the ideal choice, let me know:

• Will this be your daily driver (for regular logins, password managers, and web apps)?
• Do you plan on using a VPN like Mullvad, or a standard home connection?

Yes. Two strong choices are:

• mullvad.net — my top pick. It is developed with the Tor Project, uses strong anti-fingerprinting techniques designed to make users look alike, includes uBlock Origin, enables private browsing by default, and explicitly removes browser telemetry.
• librewolf.net — excellent alternative. It is a hardened Firefox fork with Resist Fingerprinting enabled, tracker blocking, cookie isolation, and telemetry/data collection disabled.

Which I'd choose

Mullvad Browser if your priority is anti-fingerprinting. Its design deliberately tries to make your browser fingerprint resemble other Mullvad Browser users rather than making your configuration unique.

LibreWolf if you want a more Firefox-like browser with lots of privacy controls and customization. Its developers explicitly state that they remove Firefox telemetry and data collection.

One important distinction: "no browser telemetry" doesn't mean "anonymous." Websites can still see your IP address and potentially identify you through accounts or other information. Mullvad specifically recommends pairing its browser with a trustworthy VPN when you also want to hide your IP.

If you want the strongest practical setup with minimal tinkering, I'd go with Mullvad Browser + a reputable VPN, and avoid piling on lots of privacy extensions—the extensions themselves can make your fingerprint more distinctive.

To completely eliminate telemetry and heavily mitigate browser fingerprinting, standard commercial browsers (like Chrome, Edge, or Safari) and even stock Firefox won't cut it. Stock Firefox still includes telemetry by default, and standard browsers leak significant hardware and software entropy.

The best options designed explicitly to solve this problem rely on either standardization (making you look identical to every other user of that browser) or deep hardening.

1. Mullvad Browser (Best for Strict Anti-Fingerprinting & Zero Telemetry)

• How it works: Developed in collaboration with the Tor Project (the creators of Tor Browser), Mullvad Browser takes the robust anti-fingerprinting and anti-tracking protections of Tor Browser and optimizes them for normal, everyday browsing (to be used alongside a VPN).
• Fingerprinting Defense: Uses standardization and letterboxing (adding grey margins to your window so your exact screen resolution can't be fingerprinted). Every Mullvad Browser user shares the exact same basic digital fingerprint, rendering individual tracking nearly impossible.
• Telemetry: Completely stripped of all Mozilla/Tor/Mullvad telemetry.
• The Catch: It comes pre-configured, and changing core settings or installing random extensions is discouraged because it breaks the uniform fingerprint.

2. LibreWolf (Best for Daily Usability with Hardened Privacy)

• How it works: LibreWolf is an independent, open-source fork of Firefox built entirely with privacy, security, and user control in mind.
• Fingerprinting Defense: Enables built-in strict resistFingerprinting protections by default, alongside advanced tracking protection.
• Telemetry: Completely removes all telemetry, data collection, Pocket integration, and update "phoning home" features found in standard Firefox.
• The Catch: It operates closer to a traditional browser than Mullvad, meaning you can install regular Firefox extensions (though adding too many unique extensions can slightly alter your fingerprint). It also receives fast updates alongside the main Firefox release cycle.

3. Tor Browser (Best for Ultimate Anonymity)

• How it works: Tor Browser routes your traffic through the decentralized Tor network and enforces the same uniform anti-fingerprinting model as Mullvad.
• Fingerprinting Defense: The gold standard. It forces identical window sizes, disables dangerous APIs, and groups all users into a single anonymous profile.
• Telemetry: Zero telemetry.
• The Catch: Routing traffic through multiple global volunteer nodes makes it significantly slower than standard browsing, and heavily strict security settings may break normal interactive web apps or trigger CAPTCHAs.

Quick Comparison to Help You Choose:

• Choose Mullvad Browser if you use a trusted VPN and want absolute, bulletproof anti-fingerprinting without routing through the slow Tor network.
• Choose LibreWolf if you want a drop-in daily driver that feels like Firefox but has all telemetry and tracking ripped out of the box.

To help narrow it down, are you planning to use a VPN alongside the browser, and do you need compatibility with standard extensions like password managers?

If your priorities are strong anti-fingerprinting + essentially zero browser telemetry, I’d narrow it to these:

🥇 Mullvad Browser — best overall match

Mullvad Browser is probably the closest match to exactly what you're asking for.

• Strong anti-fingerprinting: it uses the same general fingerprinting-protection approach as Tor Browser, aiming to make users look alike rather than uniquely identifiable.
• No telemetry: telemetry and crash reporting are disabled at compile time, and the telemetry-sending executable is removed.
• Private browsing by default.
• Open source and free.
• You don't need Mullvad VPN to use it; you can use another VPN or no VPN at all.

🥈 LibreWolf — excellent alternative

LibreWolf is another very strong choice.

• Specifically designed to remove telemetry and data collection.
• Uses aggressive privacy settings and RFP (Resist Fingerprinting), derived from the Tor project's work.
• Includes uBlock Origin and strict tracking protection by default.
• More customizable than Mullvad Browser, but that flexibility also makes it easier to accidentally make your browser fingerprint more unique.

What about regular Firefox?

Mozilla Firefox has excellent anti-fingerprinting protections, including increasingly sophisticated defenses against fingerprinting.

However, it doesn't meet your "does not send telemetry" requirement out of the box. Mozilla documents technical/interaction telemetry and provides settings to disable it; even with those disabled, Firefox has other background connections and a Daily Usage Ping that requires a separate opt-out.

So I wouldn't choose vanilla Firefox if zero telemetry is a hard requirement.

My recommendation

I'd pick Mullvad Browser unless you specifically want extensive Firefox customization. If your threat model is particularly serious, Tor Browser is worth considering too—it provides stronger anonymity characteristics than either of these, rather than merely reducing fingerprinting.

If you want a web browser that completely strips out telemetry and actively fights digital fingerprinting, standard mainstream browsers (and even vanilla Firefox or Chrome) won't fit your needs out of the box—they either "phone home" with telemetry or leave unique hardware/canvas signatures exposed.

The top-tier, privacy-first browsers designed specifically to solve this problem include:

• Mullvad Browser : Developed in collaboration with the Tor Project (the creators of Tor Browser), Mullvad Browser is engineered specifically to give every user the exact same standardized digital fingerprint, making you completely blend in with the crowd. It features zero telemetry, enforces private mode by default, and comes with uBlock Origin pre-installed. It is optimized to be used alongside a trusted VPN (though it works with any network).
• LibreWolf : A completely open-source, independently maintained hard fork of Firefox. LibreWolf removes all Mozilla telemetry, data collection, and startup profiling entirely. It enables Firefox's resistFingerprinting settings by default, includes uBlock Origin out of the box, and implements strict security hardening. It feels and acts like a polished version of Firefox without the privacy compromises.
• Waterfox : Another Firefox-based fork that strips out telemetry, data collection, and sponsored suggestions while maintaining full compatibility with classic extensions. While its built-in anti-fingerprinting is less aggressive than Mullvad's or LibreWolf's, it is a lighter, highly functional alternative if you need standard browser convenience without data reporting.

Which one should you pick?

• Choose Mullvad Browser if your priority is maximum fingerprint resistance where your device actively lies to tracking scripts to match everyone else's footprint.
• Choose LibreWolf if you want a standard daily-driver browser experience (with permanent storage, saved logins, and custom extensions) that is deeply hardened against tracking and completely free of telemetry.

If you can tell me whether you need this for desktop or mobile , and if you prefer a Firefox-based or Chromium-based engine, I can give you a more targeted recommendation or installation steps.