camber
An open-source browser with Arc's sidebar, spaces, pinned tabs and command bar. It is free, for macOS, Windows and Linux. The Browser Company has nothing to do with it.

Download
Installers for every platform are on the latest release. The builds are not signed yet, so macOS and Windows warn you before the first open. The release notes say how to get past each warning. The source is in the GitHub repo.
What it does
- A sidebar with spaces, favorites, pinned tabs and nested folders.
- Import from Arc on macOS and Windows: spaces, profiles, favorites, pinned tabs, folders and today tabs.
- Command bar, split view, Peek, little windows for links from other apps, and Air Traffic Control.
- Tabs you haven't looked at for an hour give their memory back and stay in the sidebar.
- Extensions from the Chrome Web Store.
- No account, no telemetry, no AI features.