Floorp is an open-source, MPL-2.0 licensed web browser built on Mozilla Firefox and aimed at Windows, macOS, and Linux users who want a Gecko-based browser they can install, inspect, and modify instead of running a stock Firefox build or a closed-source alternative.

What it is

Floorp Browser is a browser built for keeping the Open, Private and Sustainable Web alive, and it is based on Mozilla Firefox. The full source code for Floorp 12 lives in the Floorp-Projects/Floorp repository, is written primarily in TypeScript, and sits squarely in the Firefox and Mozilla Gecko ecosystem alongside the upstream codebase it derives from. The project carries the topics browser, firefox, gecko, mozilla, and webbrowser, which places it firmly as a Firefox derivative rather than an independent engine project, and it publishes its own branding, website, blog, release notes, and documentation separately from Mozilla's.

The concrete problem it solves is distribution and packaging of a Firefox-based browser that a small team controls end to end. Anyone who wants a Gecko browser with its own release cadence, its own signing and notarization chain, and its own package-manager presence has to ship installers, update infrastructure, and per-platform channels; Floorp replaces that gap by providing a signed Windows .exe installer, an Apple-notarized macOS build, and Linux packages through a PPA, Flatpak, AUR, and tarballs. The thing it replaces for an end user is the default Firefox installation on that machine, which is why the project publishes Firefox system requirements as its own baseline.

Key capabilities

• Cross-platform desktop builds for Windows 10 or later, macOS 10.15 or later, and Debian-based and Arch-based Linux distributions, on x86_64 and, for macOS and Linux, AArch64.
• Signed Windows installer using a Certum Open Source Code Signing Certificate issued to "Open Source Developer, Ryosuke Asano".
• Apple Notarization and Certification for macOS builds since version 11.0.0, plus an auto-update system introduced in the same release.
• Package-manager installation paths including winget install Ablaze.Floorp, the Scoop extras bucket via scoop install extras/floorp, and brew install --cask floorp.
• Linux distribution channels including the PPA at https://ppa.floorp.app, the Flatpak one.ablaze.floorp, AUR floorp-bin, and Slackware SBo binaries.
• Universal macOS build covering both x86_64 and ARM64 CPU architectures.
• Community translation workflow hosted on Crowdin, with a localization badge published in the README.

Who uses it and how

• Windows users on x86_64 machines running Windows 10 or later, who install through the .exe installer, winget, or Scoop; Windows 7, Windows 8, and Windows AArch64 are not supported.
• macOS users on 10.15 or later, including Apple Silicon owners, who install through the Homebrew cask and receive a notarized universal binary with auto-updates.
• Linux users on Debian-based distributions such as Ubuntu and Linux Mint through the PPA, and on Arch-based distributions such as Manjaro through AUR or Flatpak, with tarballs available as a fallback.
• Contributors and translators working through the Crowdin project and the official Discord, with documentation and release notes published alongside the source repository.
• Sponsors funding development and server costs through GitHub Sponsors, where continuous sponsorship of at least $100 per month is the threshold for advertising placement; special sponsors listed are CubeSoft, Inc., 1Password, and SignPath.

Getting started

Install by running the platform installer or extracting the archive, or by using a package manager: winget install Ablaze.Floorp or Scoop on Windows, brew install --cask floorp on macOS, and the PPA, Flatpak, AUR, or tarball on Linux. Downloads and links to all channels are collected on the official site at https://floorp.app.

How it compares

Floorp shares its engine, extension compatibility, and system requirements with Mozilla Firefox, so the difference is in the release pipeline rather than the rendering core. Compared with upstream Firefox it adds its own signing certificate, Apple notarization, auto-update system, and package-manager coverage, while remaining unaffiliated with Mozilla and distributing under its own MPL-2.0 repository. The facts provided list no paid products that Floorp replaces, so there is no proprietary browser licence or subscription being displaced here.

When to use it — and when not to

There is nothing server-side to operate: Floorp is a desktop browser, so no database, object storage, or SMTP service must be run by the user. Users on Windows 7, Windows 8, or Windows on AArch64 should not pick it, because those platforms are explicitly unsupported, and anyone wanting a long, feature-documented reference should note that the README is thin and largely covers packaging and installation. The project is actively pushed, with 98 open issues and an MPL-2.0 licence that is clear, but its funding depends on sponsorship and its development team is small, which is a real continuity risk for anyone standardizing on it.

winget install Ablaze.Floorp

scoop bucket add extras
scoop install extras/floorp

brew install --cask floorp