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OpenArch 0.1.0

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@github-actions github-actions released this 27 Oct 15:38
· 194 commits to main since this release
v0.1.0
2c78605

The first release of OpenArch: the sidebar browser you know from Arc, open source and built on Chromium 156. Arc stops working on December 22, 2026; OpenArch is meant to be ready before that.

What's in it

  • Sidebar: favorites, pinned tabs in folders and subfolders, today tabs that archive themselves after 12 hours.
  • Spaces with their own color, icon and profile, so logins, cookies and extensions stay apart. Swipe over the sidebar to change spaces.
  • Import from Arc: spaces, favorites, pinned folders, open tabs and split views, and if you like, logins and cookies, saved passwords, history and extensions too. Arc's own data stays untouched.
  • Command bar (⌘T, ⌘L) for addresses, searches, open tabs, history and commands, with site search (yt, gh, w … then Tab).
  • Split view with up to four tabs, Little OpenArch (⌥⌘N) for links from other apps, and the library for media, downloads, spaces and archived tabs.
  • Peek for links from pinned tabs and favorites, Boosts (⌃⌘B) to restyle a site, and link rules that send links from other apps to the right space.
  • Media controls in the sidebar and picture-in-picture when you leave a tab with a video playing.
  • Windows: ⌘N for another window on the same spaces, ⌘⇧N for a private window that keeps nothing.
  • Arc's keyboard shortcuts, which win over the page like in Arc.
  • Real Chrome tabs: Chrome Web Store extensions with popups and side panels, DevTools, the password manager and printing.
  • AI control: Claude Code, Playwright or Puppeteer can drive the browser over Chrome's DevTools protocol once you turn it on in Settings › KI.
  • Updates by themselves from the nightly builds, verified by checksum and installed when you quit.

Install

Requires a Mac with Apple silicon and macOS 15 or later.

  1. Download OpenArch.zip below, unzip it and move OpenArch to Applications.
  2. The build is not signed or notarized yet, so macOS blocks it at first. Run this once in Terminal: 
    xattr -dr com.apple.quarantine /Applications/OpenArch.app
  3. Open OpenArch. If Arc is installed, it offers to bring your sidebar over.

From then on, OpenArch updates itself.

Known limitations

  • The interface is in German for now.
  • Unsigned builds use Chromium's mock keychain: saved cookies and passwords are not protected by the login keychain.
  • No Widevine, so Netflix and other DRM video do not play. Google sync is not available for Chromium-based browsers.
  • Easels and Notes are not there yet. Full screen video is new.

OpenArch is an independent project and is not affiliated with The Browser Company of New York or Atlassian.

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