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Floorp vs Vivaldi: catalog facts
Floorp	Vivaldi
Free Free and open source under MPL-2.0. The project asks for sponsorship but nothing in the…	Free Free, funded by default search engine and bookmark placement deals.
Windows, macOS, Linux	Windows, macOS, Linux, Android, iOS
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	Tab stacking, tiling and vertical tabs without a single extension Built-in mail, calendar and feed reader in a side panel
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	Not open source; only the modified Chromium parts are published The sheer number of settings takes real time to work through
Downloadable app	Downloadable app
Open source	Closed source
License: MPL-2.0	License not stated
No account needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 21, 2026

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