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Floorp vs Arc: catalog facts
Floorp	Arc
Free Free and open source under MPL-2.0. The project asks for sponsorship but nothing in the…	Free Free to download and use. The software is closed source.
Windows, macOS, Linux	Windows, macOS
Vertical tabs, workspaces, split view and web panels are built in rather than bolted on with extensions Firefox underneath, so Gecko, containers and Firefox add-ons all still work	Spaces keep work, personal and project browsing genuinely separate Split view and the command bar make keyboard-driven browsing fast
A small team rebasing on Firefox, so security updates arrive after Mozilla's, not with them Less-travelled code than Firefox itself, which means interface bugs the main browser does not have	The Browser Company has shifted its development focus to a newer browser, so Arc receives limited feature work No Linux build, and an account is required to use it
Downloadable app	Downloadable app
Open source	Closed source
License: MPL-2.0	License not stated
No account needed	Account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.