Floorp is a free, open-source browser built on Mozilla's Gecko engine by the Japanese developer collective Ablaze — it takes Firefox's battle-tested core and layers on a persistent sidebar workspace system, genuine multi-session tab organisation, and privacy defaults that go meaningfully further than stock Firefox without sacrificing a single extension from your existing toolkit.
What is Floorp browser?
Floorp is a Firefox fork for Mac (and Windows and Linux) that treats UI customisation and user data sovereignty as first-class concerns. Unlike minimal forks that simply strip telemetry and republish, Floorp adds genuine daily-driver features: a collapsible Panel Sidebar that hosts pinned sites, web apps, and extensions in a persistent strip; a Workspaces system that partitions your tab bar into named sessions; and multiple browser-shell presets that let you reshape the entire chrome without touching a configuration file.
I have been running Floorp alongside Arc and vanilla Firefox for several weeks now. The sidebar earns its keep within the first afternoon: I pin my project management tool, a reference doc, and a note-taking app in a narrow column at the left edge of the window, collapse it with a single keystroke when I want focus, and restore it instantly when I need context. Arc does something similar with its Spaces model, but Floorp's panel system plugs directly into the Firefox extension ecosystem — uBlock Origin, Bitwarden, and every other Firefox add-on install exactly as they do in vanilla Firefox, which is the one thing Arc cannot honestly claim.
What does Floorp browser do best?
Floorp's strongest suit is taming tab chaos through Workspaces — named tab partitions that live independently without spawning separate browser windows. If you have ever stared at sixty open tabs wishing you could section them off without losing session state, Workspaces is the answer. Vivaldi has offered something similar for years, but Floorp delivers it on Gecko's rendering engine, which matters if you depend on Firefox-exclusive developer extensions or care about Mozilla's long record on web-standards compliance.
The UI mode system is a secondary win: you can shift the entire browser shell to a compact layout, a vertical tab strip, or a floating tab-bar aesthetic — none of it feels bolted on the way Vivaldi's perpetual options-menu density can. On the privacy front, Floorp inherits Firefox's first-party isolation, enhanced tracking protection, and container tabs, then reduces out-of-the-box telemetry further still. It is not as aggressively hardened as Brave — Brave blocks more by default and ships its own ad network — but Floorp is philosophically closer to Firefox's open-web principles, which matters to users who want meaningfully better defaults without switching rendering engines entirely.
Is Floorp browser free?
Completely free — there is no premium tier, no subscription, and no built-in upsell. The project is maintained by Ablaze, a community-driven team based in Japan, and accepts voluntary support from users who want to help sustain it long-term.
The honest caveat is worth stating plainly: because this is a volunteer-maintained project, security patches can occasionally trail Firefox's own release by a few days. For environments where zero-lag patching is a hard policy requirement, stock Firefox or Safari remains the safer institutional choice. For personal use, that gap is rarely meaningful in practice, and the team has historically been responsive.
Who should use Floorp browser?
Power users who have outgrown Firefox's sparse native UI will find Floorp the most natural upgrade path — same engine, same extensions, genuinely better organisation. Developers who depend on Firefox DevTools and want vertical tabs, workspaces, and a sidebar without juggling half a dozen extensions will see a real productivity gain. Privacy-aware users who find Brave's ad-network ideology uncomfortable but want more than Firefox delivers out of the box also land squarely in Floorp's sweet spot.
It is a poorer fit for users who rely on Apple's Continuity or Handoff features — Floorp has no iCloud Keychain integration — and anyone who prefers a completely minimal, decision-free browser experience may find the wealth of UI options overwhelming at first. That depth is a feature for the right person and noise for the wrong one.
What are the best Floorp browser alternatives?
The most natural alternative is plain Firefox itself — add uBlock Origin, Tree Style Tab, and Sidebery and you cover most of what Floorp offers, albeit with more manual setup and no unified workspaces. Arc is the premium option if you want a spatially reimagined browser and can accept a Mac-only, closed-source app with a proprietary cloud layer. Brave wins if maximum ad and tracker blocking is your top priority over UI flexibility. Zen Browser is a newer Firefox fork with a similarly sidebar-first philosophy that is worth watching, though it is earlier in its maturity arc than Floorp. For Apple-first users, Safari remains the baseline for Handoff, iCloud Keychain, and raw power efficiency on Apple Silicon chips.
