One job needs four folders open. The next job needs four different ones. Save the set under a name, open it again when you come back, and stop rebuilding the same window every morning.
Ships — you switch it on
Name it, and it is saved.
The tabs come back.
With a confirmation, because deleting a name you spent a month building should take two clicks.
An add-on is not sold on its own — a bundle is, and holding the same add-on through two bundles is never charged twice. See the bundles.
A fresh install hides anything below the default bar on this add-on’s Minimum readiness slider in Settings › Features. These are in the app today.
app.workspaces is registered InTesting, below the default bar, and the Workspaces tab is not rendered at all while it is off — so this is not a subtle difference you might miss, it is the tab being absent.Download File Manager, then pick the bundle that grants it.