Tree Style Tab

Spec sheet

Purpose

The Firefox extension organizes tabs as trees, automatically making tabs opened from the current tab its children.Read 7 Oct 2026 · github.com

Integrations

Tree Style Tab provides a public API for other extensions to interact with its tab trees and sidebar.Read 7 Oct 2026 · github.com

Privacy

The privacy policy says the software does not automatically collect privacy data; Firefox Sync may send option data and URLs of tabs sent to other devices to Mozilla's Sync server.Read 7 Oct 2026 · addons.mozilla.org

Support

The project says feedback and bug reports are handled through GitHub issues.Read 7 Oct 2026 · github.com

Browser limits

The project says it depends on Firefox-specific APIs and is not supported on Chromium or WebKit browsers.Read 7 Oct 2026 · github.com

Browsing context

The project describes each tree as a visual browsing history and a way to group tabs on similar topics.Read 7 Oct 2026 · github.com

Feature scope

The project says session management and search are outside its intended built-in feature scope and points users to helper extensions for additional functions.Read 7 Oct 2026 · github.com

Helper extensions

The add-on page lists helper extensions for multi-tab selection, automatic grouping, bookmarks, collapsed trees, and other additions.Read 7 Oct 2026 · addons.mozilla.org

Mobile limits

The project says it has no plan for Firefox Mobile support because mobile Firefox lacks the Sidebar API and many open tabs may cause memory exhaustion.Read 7 Oct 2026 · github.com

Permissions

Required permissions include access to browser tabs and recently closed tabs, and permission to display notifications; bookmark and website access permissions are optional.Read 7 Oct 2026 · addons.mozilla.org

Sidebar access

The F1 key or the Tree Style Tab toolbar button toggles the sidebar.Read 7 Oct 2026 · addons.mozilla.org

Supported browser

The project supports official latest Firefox releases, including regular Firefox and ESR.Read 7 Oct 2026 · github.com

Tree controls

Users can collapse branches and restructure the tree by dragging and dropping tabs.Read 7 Oct 2026 · addons.mozilla.org

Plans and prices

Every Tree Style Tab plan and price →

Where Specifiction places it

• Tab Management Software#27 of 277.0