Branchkeeper — Tab Tree Vault by MonteSemasPing

Branchkeeper gives large Firefox sessions a calm, compact place to live.

See every open window and tab in one collapsible tree. Press Ctrl+Shift+Space from Firefox to jump directly to search, move through results with the arrow keys, and activate the tab you need without remembering which window it was in.

Tabs and complete live windows closed through Branchkeeper are saved before Firefox closes them. Reopen one tab or a complete saved window later. Rename windows, preserve pinned tabs and Firefox container identities, and collapse the parts of the tree you do not need right now.

Saved windows can be moved to Trash and restored immediately with Undo. Emptying Trash is a separate confirmed action. For protection outside the Firefox profile, export the complete Vault as a readable JSON backup and import it later without overwriting the current session.

Branchkeeper opens in a dedicated compact manager window and is also available as a Firefox sidebar.

Your browsing data stays on your device. Branchkeeper has no analytics, advertising, host permissions, or external data service, and it does not run in private browsing windows.