xtS Amazing Duplicate Tab Manager

Prevents duplicate tabs with smart rules: Google Docs by document, suspended tabs, activation threshold, undo and more.

Too many tabs? The same page open three times? xtS Amazing Duplicate Tab Manager keeps one tab per page automatically — and jumps you back to the copy you already had open, instead of piling on another one. Unlike most duplicate-tab tools, it actually understands your tabs: the same Google Doc opened from two different links is one document, a suspended tab is matched to the real page, and you decide exactly which copy survives. WHY YOU'LL LIKE IT • Fewer tabs, less clutter, less memory used — without thinking about it • Never lose the tab you're working in: an Undo button brings any close right back • Rules that match how you actually browse, not rigid exact-URL matching SMART DETECTION (nothing else does all of this) • Google Docs, Sheets & Slides by DOCUMENT — different sheet or slide tabs of the same file count as duplicates • Microsoft Office (SharePoint & OneDrive) — experimental: treats the same Office document as one across editing URLs (off by default) • Suspended tabs — Tab Suspender, The Great Suspender, The Marvellous Suspender and forks are compared by their original URL • Configurable URL matching — ignore www, #fragments and ?query strings, globally or per site, with wildcard and regex rules CLOSES CAREFULLY, NEVER RECKLESSLY • Activation threshold — tolerate duplicates until you pass a number of open tabs you choose • Delay with a re-check before closing, so nothing closes by accident • Undo notification that also creates a temporary exception for that page • Never closes pinned tabs or tabs playing sound (both configurable) • Startup grace period — restoring your session won't trigger mass closing • Pause button for when you actually want duplicates for a while YOU DECIDE WHICH TAB STAYS • Keep the oldest, newest, or active tab • Rank pinned tabs, tab groups and loose tabs in your own priority order • Act within the current window or across all windows LIGHT BY DESIGN • 100% event-driven — no polling, no timers, no content scripts injected into your pages • Minimal permissions, no access to the content of your pages • Zero network requests, zero data collection, no ads, no tracking ALSO • One-click "close all duplicates" from the popup or a keyboard shortcut • Optional local history of closed tabs — title, time and URL, newest first, with reopen; you choose how many days and entries to keep, and it never leaves your device • Per-tab or global badge counter, statistics, import/export, reset to defaults • Optional settings sync across your devices • Available in English, Português, Español, Français, Italiano and Deutsch Your data never leaves your device. Install it, forget it, and enjoy a tidier, lighter browser.