Open Browser panel URLs on this device instead of streaming them from a remote host

[josephv123]

What I'm trying to do

I run T3 Code on a Linux box and use it from the desktop app on my Mac over Tailscale. When I open a link in the Browser panel for that remote environment, the tab runs on the host and streams to my Mac. That's what you want when an agent needs to drive the page or reach localhost on the host. For many pages it isn't needed: docs, GitHub, a dashboard, a public preview URL. Streaming makes those pages slow to scroll and type into, even though the Mac could load them directly.

What exists today

• Settings → Integrations → Browser → Open links in can be set to Your default browser on a single device.
• Cmd/Ctrl-click on a chat or terminal link opens it in the system browser.
• Right-clicking a link offers Open in system browser.
• The panel's chrome row has an Open in system browser button for the current tab.

These help with links that come from chat. Two gaps remain:

1. The URL bar has no choice. A URL typed into the panel's address bar always opens in a streamed host tab. I can't send it to my local browser without copying it out.
2. There's no local tab inside T3 for a remote environment. On desktop, the only choices are a streamed host tab or leaving the app. A tab rendered by the desktop app's own webview would feel native for pages that don't need the host.

What I'd like

• In the address bar, let a modifier (Cmd/Ctrl+Enter, matching link clicks) or a small dropdown next to the field open the URL in the system browser instead of the panel.
• Optionally, on desktop connected to a remote environment, add a third choice: Open on this device. The tab is rendered locally and is not streamed. It would be labeled so it's clear that agents can't see it and that localhost means this machine, not the host. The new-tab menu could offer it next to the profile picker.

The first is small and covers most of the pain. The second is a bigger question about tab ownership, since tabs currently belong to the environment. I'd like maintainer direction on whether a client-local tab fits that model before anyone proposes code.

Related

• [Feature]: Allow choosing a specific external browser for links (desktop) #13132: choosing a specific external browser for links
• Let me pick which browser profile a chat link opens in #14280: choosing the browser profile for a chat link
• Which Browser should serve an agent session when several desktops share an environment? #15339: which desktop should serve an agent's browser session