Privacy Policy

Last updated: October 19, 2026

    Summary: Tab Group Sync keeps your tab groups as bookmarks in your own browser profile. It has no account, no analytics and no server that receives your data. The one network request it causes is loading a small help page, tabgroupsync.bayeslearner.com/open/, in "carrier" tabs for local files. The local file path in that link sits after the #, and browsers never send that part to the server.
  

What the extension reads

Tab Group Sync uses these browser permissions:

tabs and tabGroups — to read the names, colors and page addresses (URLs) of your tab groups so they can be saved as bookmarks, and to reopen them.
bookmarks — to create, read and update the bookmark folders that hold your saved tab groups and snapshots.
storage and unlimitedStorage — to save the extension's settings and its record of which groups are synced.
alarms — to run a periodic sync that survives browser restarts.
idle — to notice when the browser goes idle, a quiet moment to check that local-file tabs still have their carrier tabs.

If you turn on "Allow access to file URLs" for the extension, it can also open and save file:// tabs, such as a PDF in your Dropbox folder. It records only the file's path, never the file's contents.

Where your data is stored

Bookmarks. Saved tab groups and snapshots are ordinary bookmark folders in your browser profile. You can see, export or delete them in the browser's bookmark manager.
Extension settings. Preferences such as auto-sync, the cleanup threshold, the chosen bookmark folder and per-group sync choices are kept in the browser's extension storage. Some of it is in chrome.storage.sync; some, such as your home folder path on this computer, is in chrome.storage.local and stays on this device.

If you have turned on sync in your browser (a Google account in Chrome, a Microsoft account in Edge), the browser copies those bookmarks and synced settings to your other devices, as it does for any bookmark. That copy is made by your browser vendor under its own privacy policy. Tab Group Sync has no part in it and cannot see it.

Carrier tabs for local files

Browsers drop file:// tabs when they sync tab groups or Edge Workspaces. To keep a local file with its group, Tab Group Sync opens a companion "carrier" tab beside it. The carrier tab's address looks like this:

https://tabgroupsync.bayeslearner.com/open/#/Users/you/Dropbox/Books/notes.pdf

What the server receives. When a carrier tab loads, your browser requests https://tabgroupsync.bayeslearner.com/open/. Browsers do not send the part after #, so the server never receives the file path. The page is a static file served by Cloudflare Pages. Like any web server, Cloudflare receives the usual request details: your IP address, browser user agent, the time, and the page requested. We do not run analytics on this page, set cookies, or load third-party scripts. Cloudflare's handling of request data is described in its privacy policy.
Where the path does appear. The full local path, which often includes your user name, is part of the carrier tab's address. So it appears wherever your browser keeps tab addresses: your synced tabs or Workspace, your browsing history, and a bookmark if a carrier tab is saved into a group. It stays inside your browser and your browser account.
How to avoid it. If you do not use local files in tab groups, no carrier tabs are created and the extension makes no network requests at all.

What we do not do

No accounts and no sign-in.
No analytics, telemetry, advertising or tracking.
No selling, sharing or transfer of your data to anyone. We have no copy of your data to share.
No remote code: all of the extension's code ships inside the extension package.

Tab Group Sync uses tab and bookmark data only to save and restore your tab groups, the single purpose described in its store listings. Its use of this data complies with the Chrome Web Store User Data Policy, including the Limited Use requirements, and with the Microsoft Edge Add-ons developer policies.

Nothing is backed up until you choose to: you turn sync on for each group, or turn on auto-sync for new groups in Settings.

Links you choose to open

The extension's popup, welcome page and help contain links, for example to this site or to a page where you can support development. Opening one is an ordinary visit to that website, under that site's own privacy policy.

Deleting your data

Uninstalling the extension removes its settings from extension storage. Your bookmark folders stay in your bookmarks, because they are yours; delete them in the bookmark manager if you no longer want them. Carrier tabs are ordinary tabs; close them, and clear your browsing history if you want their addresses removed from it.

Children's privacy

The extension does not collect information from anyone, including children under 13.

Changes to this policy

If how the extension handles data changes, this page and its "Last updated" date will change with it.

Contact

Questions about this policy: [email protected].