Flecha is an open source alternative to Arc. Open-source Arc-style Chromium browser for developers with Spaces, vertical tabs, a dev command bar, and a local MCP server for coding agents. MIT licensed, 122 GitHub stars, no terminal required to start, and last released 2026-11-02.
Open-source Arc-style Chromium browser for developers with Spaces, vertical tabs, a dev command bar, and a local MCP server for coding agents.
In the product
Should you switch?
Built by Luciano Dii Souza (OPrimoDev), Flecha is best for developers migrating off Arc who want vertical tabs, cookie-isolated Spaces, Peek, and Boosts on a real Chromium 158 fork (preserving Google Sign-in and Chrome Web Store extensions), plus a developer command bar and a local MCP server on 127.0.0.1 for coding agents like Claude Code.
You use Windows, need a stable prebuilt Linux binary today (official signed DMGs currently target macOS 13 Ventura+ on Apple Silicon and Intel, while Linux .deb packaging is still in early development), or rely on cross-device cloud tab sync.
Flecha is an early v0.1.x Chromium fork maintained primarily by a solo developer, so keeping pace with upstream Chromium security patches and fixing early stability bugs (such as macOS sleep/wake freezes reported in Issue #19) is an ongoing risk. Also note that enabling the local MCP server exposes open tabs, DOM, and console execution to local clients holding the MCP token.
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Community proof
Some quotes here endorse the approach rather than report first-hand use, or report a problem. We label those.
"If the Macbook is on sleep for a while, when I open it the browser just freezes, commands don't work anymore, switching spaces, new tabs, everything is frozen. I have to kill the app and restart to continue, which is frustrating."
"Importing from another browser brings bookmarks and history, but not cookies, so after switching to Flecha you have to sign in to every site again. That's the main thing stopping it from being a drop-in daily browser."
"Responsive mode is cool, found a couple rough edges so figure I'd submit a PR."
Maintenance health
Can you do it today?
No public launch path found.
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