Tree Style Tab review

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Tree Style Tab is a free Firefox extension for organizing browser tabs in hierarchical trees. It suits Firefox desktop users who open related tabs in groups and want those relationships represented visually. New tabs opened from the current tab are placed beneath it, creating parent-child structures that can be collapsed, expanded, and rearranged. The approach is particularly relevant to users who prefer a navigable tree over a flat tab strip.

Its standout feature is the level of control over tab branches. Users can collapse and expand sections, restructure trees with drag and drop, and preserve tree information through Firefox session data. Tab trees can also be saved as bookmark folders, which gives longer-term organization a place outside the active session. Built-in sidebar themes and customization options allow the interface to be adjusted, while the public API supports helper extensions for additional workflows.

Tree Style Tab is focused rather than broad. Firefox Sync storage can send tabs or entire tab trees between Firefox devices, but the extension is designed for Firefox desktop and is not available for Chrome, Safari, or Firefox Mobile. Its core feature set also leaves tab search, tab suspension, and workspaces outside the product. Choose it if hierarchical organization, branch management, and Firefox integration are the priorities. Users seeking built-in search, suspension, workspace support, or wider browser coverage should choose a different tab-management approach.

Tree Style Tab pros and cons

• Where it wins
  • Automatically creates parent-child relationships between newly opened tabs
  • Preserves tab trees in Firefox session data and Firefox Sync
  • Supports branch controls, drag-and-drop restructuring, and bookmark export
• Where it doesn't
  • Designed for Firefox desktop rather than Chrome, Safari, or Firefox Mobile
  • Does not provide built-in tab search or tab suspension
  • Does not include workspace support

Tree Style Tab fact sheet, pricing and score →

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Last updated 7 Oct 2026 · How we research and update