Last updated: 2026-09-11

Workspace01 is a Firefox add-on that organizes open tabs into named workspaces.

• Workspace names, their order, and which workspace is active.
• For each workspace, the URLs and page titles of its tabs, used only to re-open the workspace if its browser window no longer exists.

All data stays in the browser in browser.storage.local (plus a per-tab workspace id stored with the sessions API). Nothing is sent to the developer or to any third party. The extension makes no network requests and loads no remote code.


Deleting a workspace removes its saved tab list. "Reset all workspaces" removes everything. Uninstalling the extension removes all stored data.


Open an issue at https://github.com/ntrezowan/workspace01-firefox/issues