LibreWolf

A fork of Firefox, with enhanced security and privacy settings.

Ad-Free Privacy Friendly Open Source No Third-Party Trackers Energy Efficient
Website

Description

LibreWolf is a community-driven, privacy-focused fork of Firefox, designed to maximise protection against tracking, fingerprinting and data collection. It removes all telemetry, ads and anti-freedom features (like DRM) while maintaining compatibility with Firefox extensions and the latest security updates. LibreWolf is fully open-source and prioritises minimal data exposure. The Extension uBlock Origin is pre-installed.

In 2025, LibreWolf has been praised for its commitment to avoiding generative AI and maintaining a telemetry-free, ad-free experience.

Website

Sustainability Features of LibreWolf

Ad-Free - Services that do not display advertisements to users, ensuring a cleaner and more private experience.

LibreWolf is mostly ad-free, ensuring a cleaner and more private user experience.Source: LibreWolf Features

Privacy Friendly - It does not track users unnecessarily.

LibreWolf blocks trackers, ads and fingerprinting by default, with enhanced protections like uBlock Origin pre-installed and stricter privacy settings.Source: LibreWolf Features

Open Source - Free and Open-Source Software

LibreWolf is fully open-source, allowing for community audits, contributions and transparency in its development.Source: Codeberg Repos

No Third-Party Trackers - Services that do not use third-party cookies or trackers, ensuring user privacy.

LibreWolf does not allow third-party cookies or share user data with external parties.Source: LibreWolf Features

Energy Efficient - Hardware or services designed to consume minimal energy, reducing environmental impact.

LibreWolfs’s built-in ad and tracker blocking reduces unnecessary data and energy consumption. The decision to avoid AI bloat in its browser saves even more resources.

Website

Summary

LibreWolf is a hardened, privacy-focused fork of Firefox, offering robust tracking and ad blocking, full open-source transparency and a commitment to user freedom. It is a top choice for users prioritising privacy and minimal data exposure.

Sustainability Score
91

More Sustainable Alternatives for Browser

Mullvad Browser

A privacy-focused browser with Tor Project Collaboration.

Mullvad is a based in Sweden.
Mullvad’s built-in ad and tracker blocking reduces unnecessary data and energy consumption, making it more efficient for users on limited data plans or battery-powered devices.
Mullvad Browser does not allow third-party trackers or share user data with external parties.
Mullvad Browser removes most ads and sponsored content, ensuring a clean and distraction-free browsing experience.
Mullvad Browser blocks trackers, ads and fingerprinting by default, with pre-installed uBlock Origin.
Website
firefox logo

Firefox

A popular open-source web browser developed by Mozilla.

Firefox’s Enhanced Tracking Protection blocks third-party trackers and fingerprinting scripts by default, especially in Private Browsing Mode and Strict mode.Source: Firefox blocks fingerprinting
Firefox’s built-in ad and tracker blocking reduces unnecessary data and energy consumption, making it more efficient for users on limited data plans or battery-powered devices, especially when combined with the uBlock Origin Plugin.
Firefox does not allow third-party trackers in its default browsing experience.Source: Third-party cookies and Firefox tracking protection
Firefox is fully open-source, allowing for community audits, contributions and transparency in its development.Source: Github Repo
Website
vivaldi logo

Vivaldi

A highly customisable ad and AI free web browser based on Chromium.

Vivaldi’s built-in ad and tracker blocking reduces unnecessary data usage and saves energy. Additional energy is saved by avoiding AI bloat in its browser.
By default Vivaldi does not allow third-party cookies.
Vivaldi Technologies is based in Norway.
Vivaldi blocks ads and trackers by default, with a privacy dashboard for visibility into blocked content.Source: Fighting for a better web
Vivaldi is mostly ad-free, ensuring a cleaner and more private user experience.
Website
duckduckgo logo

DuckDuckGo

A privacy focused alternative to Google and Bing, offering a NoAI version of its service.

DuckDuckGo is free of charge. Its business model is based on keyword based advertisement.
DuckDuckGo can be used anonymously without registration.
DuckDuckGo’s tracker blocklists, browser extensions and some tools are open-source and auditable.
DuckDuckGo offers a browser and extensions that block third-party trackers, enforce encryption and provide features like Global Privacy Control and CNAME Cloaking Protection.
DuckDuckGo does not track users, store personal information, or create user profiles, ensuring complete privacy.
Website
brave logo

Brave

A privacy-focused web browser based on Chromium.

Brave’s built-in ad and tracker blocking reduces unnecessary data and energy consumption, making it more efficient for users on limited data plans or battery-powered devices.
Brave does not use third-party trackers or allow external parties to collect user data.
Brave blocks ads, trackers and third-party cookies by default, reducing exposure to online tracking and fingerprinting.
Brave is ad-free by default, ensuring a cleaner and more private user experience.
Website

Suggestions and Feedback

If you have suggestions for more alternatives or general feedback, please contact me via email or create an issue over on Codeberg. Suggest Substitute on Codeberg Write an Email