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Preview of BookSync

BookSync by FulgerX2007

End-to-end encrypted bookmark sync across your browsers, through your own server.

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About this extension
BookSync keeps your bookmarks in sync between Firefox, Chrome, Edge and the BookSync Android app, through a server you run yourself. Everything is end-to-end encrypted: the server stores your bookmarks, but it can never read them.

How it works
  • Run the BookSync server (a single Docker container) on your own machine or VPS.
  • Create an account in the add-on and save the emergency kit it shows you.
  • Sign in with the same account in your other browsers. Bookmarks sync within about a minute, in every direction.

Features
  • Two-way sync of your bookmarks toolbar, menu, other bookmarks and their folders.
  • Search all your bookmarks from the toolbar, and save the current page in one click.
  • A full bookmark manager: drag and drop, rename, move, delete.
  • Version history on the server: restore an earlier state of all your bookmarks.
  • Safety checks: BookSync asks before a sync that would delete many bookmarks, and never silently goes back to an older server copy.
  • See and sign out the devices on your account.

Privacy
  • Bookmarks are encrypted in your browser (AES-256-GCM) with keys derived from your password and a secret SyncID. Neither ever leaves your devices.
  • No analytics, no ads, no tracking. The add-on talks only to the server you enter.
  • Open source: https://github.com/FulgerX2007/BookSync

BookSync needs a BookSync server; the README shows how to set one up in a few minutes.
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Permissions and data

Required permissions:

  • Read and modify bookmarks

Required data collection, according to the developer:

  • Authentication information
  • Bookmarks
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More information
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Version
1.3.1
Size
76.4 KB
Last updated
2 days ago (Oct 27, 2026)
Related Categories
  • Privacy & Security
  • Bookmarks
License
Mozilla Public License 2.0
Privacy Policy
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