SCOOP: Muse 10.0 code points to a Chrome bridge for the logins its cloud browser cannot use
Muse's cloud browser has to sign in from scratch on sites that may demand one-time codes or block it outright. Muse 10.0 contains an "Add tab" flow, a gated Chrome extension row promising more reliable control, and local bridge code that could start from the Chrome tab a user has already authenticated, although RuntimeWire has not seen the flow work live.
By Ryan Merket · Published
RUNTIMEWIRE INVESTIGATION — Scoop
Original reporting by RuntimeWire, based on reverse engineering, testing.
Why it matters
Muse's dedicated cloud browser starts without the sign-ins, trusted-device history, and two-factor approvals already stored in a person's Chrome, so login-heavy sites and anti-bot checks can stop a task before it begins. That friction is severe enough to drive users away from Muse. A local Chrome bridge that reused the existing session would address the complaint directly, putting Muse in line with Kimi WebBridge, Claude in Chrome, and OpenAI's ChatGPT extension. The 10.0 code shows the attachment flow and bridge machinery, but it does not yet prove Muse receives page content, cookies, or control of a signed-in local session.
Reporting record
Finding
Meta's Muse 10.0 Mac package contains shared extension-panel code that can attach a Chrome tab reference to a chat message.
How we verified
Methods: reverse engineering, testing.
The signed production package contains the Add tab action, panel message handlers, composer attachment state and outgoing browser-tab record; the 9.0 package lacks the named attachment helpers.
RuntimeWire verified the package's production-updater origin, updater signature and static cryptographic seals, traced the client code and compared it with Muse 9.0 and an earlier 10.0 package. It did not run Muse or observe the extension workflow live.
Reproduction
RuntimeWire was not able to independently reproduce the finding.
Meta's Muse 10.0 client contains an "Add tab" flow that can attach the current Chrome tab to a chat message, RuntimeWire found by inspecting the [signed production…
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