Alternatives / Firefox
Open-source alternatives to Firefox
8 alternatives are compared by license, workflow, self-hosting, pricing, and fit for different use cases.
Written by Maxime DERAME
Last updated:
Why look for a Firefox alternative?
Firefox is an open-source browser known for Gecko, privacy features, extensions, synchronization, and independence from Chromium. People look for alternatives when they want stronger privacy defaults, deeper customization, Chromium compatibility, fewer integrated services, or a browser engine independent from both Chromium and Gecko.
Ladybird is a BSD-2-Clause browser built around an independent engine, developed without Chromium, WebKit, or Gecko dependencies by a nonprofit initiative.
Pricing: Free and open source; early-stage development builds are evolving.
- Independent engine
- No Chromium or Gecko dependency
- Nonprofit-backed open-web focus
- Early in development
- Website compatibility is evolving
- Smaller contributor ecosystem
Zen Browser is an MPL-2.0 Firefox-based browser focused on vertical tabs, split views, workspaces, compact layouts, privacy, and extensive interface customization.
Pricing: Free and open source under MPL-2.0.
- Vertical tabs and workspaces
- Firefox extension compatibility
- Strong customization and productivity features
- Younger project
- Smaller community
- Depends on Mozilla's Gecko engine
Brave is an MPL-2.0 Chromium-based browser with built-in blocking for ads, trackers, cookies, and fingerprinting, plus synchronization, mobile apps, and Chrome extension compatibility.
Pricing: Free and open source; optional Brave services may have separate terms.
- Mature browser
- Built-in ad/tracker blocking
- Chrome compatibility, sync, and mobile apps
- Chromium-based
- Includes optional integrated Brave services
- Less engine diversity than Gecko alternatives
Helium is a GPL-3.0 Chromium-based browser focused on privacy and simplicity, with built-in ad and tracker blocking, fingerprinting protection, HTTPS enforcement, and reduced Google integrations.
Pricing: Free and open source; upstream Chromium components retain their respective licenses.
- Chromium compatibility and Chrome extensions
- Built-in ad/tracker blocking
- Minimal interface and no analytics focus
- Still Chromium-based
- Beta-stage project
- No built-in sync by design
Waterfox is an MPL-2.0 Firefox-based browser with reduced telemetry, built-in content blocking, private containers, privacy-focused DNS features, and Firefox extension compatibility.
Pricing: Free and open source under MPL-2.0; hosted services may be offered separately.
- Firefox/Gecko foundation
- Reduced telemetry and private containers
- Firefox extension compatibility
- Depends on Firefox upstream
- Smaller community than Firefox
- Less hardened than LibreWolf in some areas
LibreWolf is an MPL-2.0 community Firefox fork that removes Mozilla telemetry and sponsored integrations, applies hardened privacy settings, and includes uBlock Origin by default.
Pricing: Free and open source under MPL-2.0.
- Strong privacy defaults
- No Mozilla telemetry or sponsored content
- uBlock Origin and fingerprinting resistance
- Hardened settings can break websites
- DRM disabled by default
- Less convenient built-in sync
Flow is a GPL-3.0 Chromium browser focused on productivity, spaces, profiles, sidebar navigation, a command palette, and Chrome extension support.
Pricing: Free and open source under GPL-3.0.
- Spaces and profiles
- Command palette and sidebar navigation
- Chrome extensions and open development
- Younger project
- Chromium-based
- Privacy features are still evolving
Modern Midori is an MPL-2.0 lightweight browser focused on privacy, tracker blocking, workspaces, customization, and cross-platform availability on a Firefox-derived foundation.
Pricing: Free and open source under MPL-2.0.
- Lightweight approach
- Firefox-derived engine
- Tracker blocking, workspaces, and customization
- Smaller ecosystem
- Architecture has changed over time
- Less mature than Firefox
Compare Firefox alternatives
| Tool | Stars | License | Self-hosted | Pricing |
|---|---|---|---|---|
| Ladybird | 66.4K | BSD-2-Clause | Yes | Free and open source; early-stage development builds are evolving. |
| Zen Browser | 44.7K | MPL-2.0 | Yes | Free and open source under MPL-2.0. |
| Brave | 23.8K | MPL-2.0 | Yes | Free and open source; optional Brave services may have separate terms. |
| Helium | 21.2K | GPL-3.0 plus upstream licenses | Yes | Free and open source; upstream Chromium components retain their respective licenses. |
| Waterfox | 6.3K | MPL-2.0 | Yes | Free and open source under MPL-2.0; hosted services may be offered separately. |
| LibreWolf | 1.3K | MPL-2.0 | Yes | Free and open source under MPL-2.0. |
| Flow | 1.1K | GPL-3.0 | Yes | Free and open source under GPL-3.0. |
| Midori Browser | 405 | MPL-2.0 | Yes | Free and open source under MPL-2.0. |
Which one should you choose?
Want the strongest Firefox-based privacy defaults
LibreWolf removes Mozilla telemetry and sponsored integrations while applying hardened privacy settings and shipping uBlock Origin by default.
Want a modern customizable Firefox experience
Zen adds vertical tabs, split views, workspaces, compact layouts, and extensive UI customization on top of Gecko.
Want Chrome extension and website compatibility
Brave uses Chromium, includes built-in ad and tracker blocking, and offers strong compatibility with Chrome extensions and websites.
Want an independent browser engine
Ladybird is building a new browser engine rather than relying on Chromium, Gecko, or WebKit.
Want Firefox with fewer Mozilla services
Waterfox keeps the Firefox-derived foundation while reducing telemetry and adding privacy and productivity features.