Arc stops working on December 22, 2026
Arc closes.
OpenArch opens.
The sidebar browser you know, rebuilt as open source on real Chrome. Your spaces, logins and extensions move over in one step.
Favorites, pinned folders and today’s tabs, in the sidebar you already know.
Everything comes along.
OpenArch reads your Arc data right on your Mac. No account, no upload. Arc stays untouched.
- Spaces, colors & icons
- Favorites
- Pinned tabs & folders
- Open tabs & split views
- Logins & cookies
- Saved passwords
- History
- Extensions & settings
Command bar · ⌘T
⌘T finds everything.
One field for addresses, searches, open tabs, pinned pages, history and commands. Enter takes you there, or straight back to the tab you already have.
Split View · ⌃⇧=
Two pages, one view.
Drag a tab onto the page, or onto another tab in the sidebar. Up to four pages side by side or stacked, with dividers you can drag.
Spaces · ⌃1–9
A space for every part of your day.
Each space has its own color, pinned folders and tabs. Give it a profile and it keeps its own logins and extensions, so work and private never mix.
And all the little things.
- Peek
- Links open in a card over the page. Keep, split, or Esc.
- Boosts
- Recolor a site, zap what annoys you, add your own CSS and JS.
- Site search and questions
- Type yt or gh, press Tab, search that site. A whole question goes to Claude or ChatGPT.
- Link rules
- Links from Mail or Slack go straight to the right space.
- Media controls
- What plays elsewhere shows in the sidebar, then picture-in-picture.
- Hover sidebar
- Hide it, touch the left edge, and it floats back.
- Glass
- Let the desktop shine through. On macOS 26 the whole window is one sheet of Liquid Glass in your space’s color.
- GitHub live folders
- Pinned folders that fill themselves with your pull requests, reviews or issues.
- Sleeping tabs
- Tabs you have not looked at in a while free their memory and wake up when you come back.
- Private windows
- Their own profile in memory, no history, gone when you close them.
- Real Chrome tabs
- Every extension from the Chrome Web Store, DevTools included.
- Updates by themselves
- Each new Chromium build, checked and installed when you quit.
Your hands already know it.
- ⌘TCommand bar
- ⌘SSidebar
- ⌘DPin tab
- ⌃1–9Spaces
- ⌃⇧=Split View
- ⌥⌘NLittle OpenArch
- ⌘⇧LLibrary
- ⌃⌘BBoost
- ⌘⇧TReopen tab
- ⌃0Agents
Agents next to your tabs.
Chat with Claude Code in the sidebar, right where your tabs are, on your own login and without an API key. It keeps working while you browse, and with AI control on it drives your real tabs too.
The ✨ in the space bar (⌃0) is a space for all of them: every agent chat and every Claude Code session on your Mac, by status or by project. You see at a glance what is working and what waits for you.
Rather stay in your terminal? Let Claude Code, Playwright or Puppeteer drive OpenArch with your logins. Off by default; turn it on under Settings › KI.
claude mcp add openarch -- npx -y chrome-devtools-mcp@latest --browser-url=http://127.0.0.1:9222
Questions
Is this made by The Browser Company?
No. OpenArch is an independent open-source project. It is not affiliated with The Browser Company or Atlassian, and it contains no code from Arc.
macOS says it can’t check OpenArch for malware.
Early builds are not notarized yet. Move OpenArch to Applications, then allow it once under System Settings › Privacy & Security, or run xattr -dr com.apple.quarantine /Applications/OpenArch.app in Terminal. Updates install themselves after that.
How does OpenArch update?
It checks GitHub at launch and every six hours, verifies the checksum, and swaps itself the next time you quit.
Does it run on Intel Macs?
Not yet. Builds are for Apple silicon and macOS 15 or later.
What happens to my Arc data?
OpenArch only reads it. For logins and passwords, macOS asks you once whether OpenArch may use Arc’s key from your keychain.