Privacy Policy
Doppel Bridge ("the extension") is a developer tool that lets your own AI agent automate your own browser. It is built to keep everything on your machine.
What the extension does
The extension opens a single WebSocket connection to a companion Doppel
server running locally on your computer at ws://127.0.0.1:9333.
At your direction (through your AI agent), it relays a restricted set of
Chrome DevTools Protocol commands to the tabs you are automating: reading the
page's accessibility tree and structure, dispatching trusted clicks and
keystrokes, navigating, and capturing screenshots.
Data the extension handles
- Web page content and structure of the tabs you automate. Read on
demand when your agent acts, and sent only to the local Doppel server
on
127.0.0.1(the same machine). From there it is available to the AI agent you yourself are running. - Your local auth token, stored in
chrome.storage.local, used to authenticate the extension to the local server. It never leaves your device. - A diagnostics opt-in flag, stored locally.
What the extension does NOT do
- It does not send any data to the extension's developer.
- It does not send any data to any third-party server or analytics service.
- It does not track your browsing, build a profile, or sell or share data.
- It contains no advertising and no remote code.
All network traffic from the extension goes to 127.0.0.1:9333
on your own machine and nowhere else. Where your local AI agent sends data
after that is governed by that agent's own provider and your configuration,
not by this extension.
Permissions
Each permission is used only for the automation described above:
debugger (send the CDP commands), tabs /
tabGroups (target and organize automation tabs),
alarms (keep the local connection alive), storage
(hold the local token), offscreen (read the light/dark theme for a
legible toolbar icon), and host access (automation can be directed at any site
you choose).