Spaces that stay apart
Each space is its own Chromium profile, with its own logins, cookies, history, passwords and extensions. Work, personal and client accounts live side by side in one window.
Free and open source, for Mac
Your browser, in spaces.
Flux keeps a sidebar, folders and spaces that stay apart, in one window. Made for people who loved Arc, built on Chromium, and yours to read and change.
Coming soonView on GitHub
macOS 15 or later, Apple silicon
Flux with its sidebar and a page
Spaces
One window. Nothing leaks.
A space is more than a color. Each one is a separate Chromium profile, so you can stay signed in to two Google accounts, keep client work away from your own, and give each space only the extensions it needs.
- Separate cookies, logins and passwords
- Separate history and extensions
- Switch with a click, or with ⌃1 to ⌃9
Switching between spaces
Features
Everything you used every day.
A sidebar, not a tab strip
Pinned tabs, folders and subfolders on the left, today’s tabs below them. Tabs you leave alone get archived, so the sidebar never fills up.
Split view and Peek
Put two or more pages side by side. Open a link in a floating preview, then make it a tab without loading it again.
Downloads with your screenshots
Recent downloads and macOS screenshots in one tray, wherever they were saved. Drag any of them straight into another app.
Chrome extensions
Install from the Chrome Web Store, per space. Popups, side panels and toolbar buttons work as they do in Chrome.
Links from other apps
Links from Mail, Slack or Notes open in a little window, without breaking your tabs. Rules can send them to the right space.
Translation
Translate a selection with the Mac’s own translator, or a whole page with the service of your choice.
A mini player
Music and video keep playing in a small player when you switch tabs or spaces, with controls that reach the page.
Private windows
Nothing they open is written to disk, and everything is gone when the window closes.
DevTools docked next to a page
For developers
DevTools, one click away.
Turn on developer mode for a site and a bar appears above the page, with the element picker, the console and the network panel one click away. Choose the tools and their order. DevTools dock in the window, with Chrome’s device mode for responsive work.
Coming from Arc
Bring your spaces with you.
Arc stops on December 22, 2026. Flux opens with an offer to import it, with your spaces, your pinned tabs and your folders where you left them.
| In Arc | In Flux |
|---|---|
| Spaces, with their name, emoji and color | Spaces, each with its own profile |
| Favorites at the top of the sidebar | Pinned tabs |
| Pinned tabs and folders | Favorites and folders |
| Split views | Split views, with the same widths |
| Today’s tabs | Today’s tabs, when you ask for them |
| Peek and Little Arc | Peek and little windows |
Flux also imports from Dia, Chrome, Brave, Edge and Firefox.
Open source
A browser nobody can take away.
Flux is under the Mozilla Public License 2.0. The code is on GitHub, every important choice is written down, and anyone can build it, fix it or carry it on. No account, no analytics, no company that can shut it down.
Questions
Is Flux free?+
Yes. Flux is free and open source, under the Mozilla Public License 2.0. You can read the code, build it yourself and change it.
Which Macs does it run on?+
Macs with Apple silicon, on macOS 15 or later. Intel Macs aren’t supported.
Is it based on Chromium?+
Yes. Flux runs on Chrome’s own framework, built from Chromium, so sites, extensions and DevTools behave as they do in Chrome. The app around it is native Swift.
Can I bring my Arc spaces?+
Yes. The first time it opens, Flux offers to import from Arc, Dia, Chrome, Brave, Edge or Firefox. Your other browser is only read, never changed.
Does Flux collect data?+
No. Flux has no account and sends no analytics. Your browsing data stays on your Mac, in your profiles.
Is it ready?+
Flux is young. Version 0.1.0 is the first public release, and things will move fast. Bugs and ideas are welcome on GitHub.
Try Flux.
Version 0.1.0 is almost here. Until then, you can build it from source.
Coming soonBuild from source