NexusBrowser

Chrome bridge shared by Antigravity, Claude and Codex (NexusBrowser): each agent in its own background tabs.

NexusBrowser lets the AI agents on your PC (Claude, Codex, Antigravity) use your own Chrome, with your sessions, in background tabs: each agent works in its own tabs, grouped under its name, while you keep browsing in yours. This extension is one of three pieces that run on your PC only: the extension, a local bridge (127.0.0.1) and an MCP server that your AI app starts. Install them all with one command (Windows 10/11): https://github.com/pironjulien/NexusBrowser#install What the agent can do in its own tabs: - open pages, click and type with trusted input, fill whole forms, pick options, upload files; - read pages cheaply (interactive map, Markdown export), take screenshots and PDFs; - answer alert/confirm/prompt dialogs, work inside cross-origin iframes; - inspect network requests and response bodies (secret headers and fields masked); - export Google Docs, Sheets and Slides, YouTube transcripts, wait for downloads. Guard rails held by the extension and the bridge, not by the agent: - an agent only touches the tabs it opened; your tabs only if you ask it to adopt one; - sending, paying, publishing or submitting a form with your data needs your explicit yes, for that exact action; - password, one-time-code and card values are never returned; the bridge accepts only this extension, with authenticated, signed messages; - emergency stop for every agent: Ctrl+Alt+Shift+Esc. No account, no telemetry, no remote server: nothing is sent to the author or to any third party. Open source (MIT): https://github.com/pironjulien/NexusBrowser