Bookmark Bridge Privacy Policy

Effective 2026-09-12.

In short

Bookmark Bridge collects nothing. No data leaves your computer. There is no
server we operate, no account, no analytics, and no third party involved.

What the extension can access

The extension requests three Chrome permissions:

• bookmarks — reading and changing your bookmarks is the entire purpose of
  the extension. An MCP client asks it to list, rename, move, create or delete
  bookmarks, and it performs those operations through Chrome's bookmark API.
• storage — stores your chosen port number, the on/off switch, and a local
  record of recent bookmark events so the extension can tell which changes you
  made yourself. This lives in your browser profile.
• alarms — wakes the extension's background worker, which Chrome otherwise
  puts to sleep, so it can reconnect to the local program.

The extension also declares ws://127.0.0.1/*. That is the loopback address:
your own computer, reachable by nothing else.

Where your bookmark data goes

Only to a program running on your own computer, over a WebSocket connection to
127.0.0.1. That program is the Bookmark Bridge MCP server, which you install
and run yourself. The extension will not connect anywhere else, and it rejects
any connection attempt that carries a web page origin, so a website cannot reach
it.

We do not receive your bookmarks. We could not: there is no endpoint to receive
them. The developer operates no service for this extension.

What is stored, and where

Two things are written to disk, both on your own computer:

• A local record of recent bookmark events in the browser's extension
  storage, capped at 2,000 entries. It exists so the tool can distinguish your
  own edits from its own before making changes.
• Snapshots of your bookmark tree in a local git repository at
  ~/.local/state/bookmark-bridge/history, written by the MCP server so that a
  mistaken change can be undone. These stay on your machine. Deleting that
  directory removes them.

Neither is transmitted anywhere. To remove everything, uninstall the extension
and delete that directory.

Selling or sharing

None. Your data is not sold, not transferred to third parties, and not used for
anything other than the bookmark operations you ask for.

Changes to this policy

Revisions are published on this page with an effective date. Previous versions
stay available.

Source code

The extension and the server are open source under the MIT license:
https://github.com/semanticist21/bookmark-bridge. You can read exactly what
they do.

Contact

[email protected]