Floorp
FreeA Firefox fork you can rearrange however you want
An open-source Firefox-based browser focused on interface customization. The tab bar can sit at the top, bottom or vertically at the side, with multi-row tabs, split view, sidebar panels and workspaces. Telemetry and sponsored content are off by default, and Firefox extensions work directly.
Why we picked it
Firefox's customizability has eroded over the years — interface options longtime users relied on were removed, and restoring them means hand-writing userChrome.css. Floorp exists to turn those capabilities back into ordinary settings.
8,328 stars, MPL-2.0, developed by a Japanese team, with frequent releases (currently v12.16.4).
What it lets you rearrange:
- Tab bar position: top, bottom, or vertically down the side. Vertical tabs save considerable space on widescreens, making this an alternative to Zen and Vivaldi.
- Multi-row tabs, so dozens of tabs do not compress into unreadable slivers — something Firefox supported years ago and later removed.
- Split view: two tabs side by side in one window, convenient for writing against a reference.
- Workspaces separating work, study and leisure tabs into isolated groups.
- Sidebar panels pinning frequently used sites such as notes or chat for instant access.
- Theming beyond the bundled themes, including community-made styles.
On privacy, telemetry and sponsored recommendations are off by default and the built-in tracking protection can be tightened. The Firefox base means uBlock Origin and other extensions install normally.
To be clear about:
- It is not a privacy-specialist browser. Its defaults are cleaner than Firefox's, but its fingerprinting resistance does not match LibreWolf or Mullvad Browser. The selling point is interface freedom, not maximum privacy — do not conflate the two.
- Upstream Firefox updates arrive with a lag. As a fork it needs time to merge upstream security fixes, which typically means trailing slightly. Weigh that if update latency matters to you.
- The team is small. Compared with Mozilla or Brave, this is a small-team project, and long-term maintenance is correspondingly less certain.
- The settings panel is dense because of everything it exposes, which is disorienting at first.
How to choose: vertical tabs, split view and a taste for tinkering → Floorp or Zen; the cleanest privacy defaults → LibreWolf; anonymity → Mullvad Browser or Tor Browser.