Dupeless — Duplicate Tab Manager

Find, review, and close duplicate tabs across all your windows. Fast with 1,000+ tabs. Nothing is closed without your confirmation.

Dupeless finds duplicate tabs in all your browser windows and helps you close them safely. It stays fast with 1,000 tabs and more. How it works: - Click the toolbar icon. A page opens and lists all your open tabs, grouped by website. - Tabs with the same address are marked as duplicates. The part after "#" is ignored. - Click "Select duplicates". The extension selects the extra copies. One copy of each page stays open, and pinned copies stay unselected. - Review the list. Use the checkboxes to add or remove tabs, or select a whole website. - Click "Close selected tabs". A dialog shows how many tabs will close. It warns you about pinned tabs, tabs that play audio, and pages that will have no open copy left. Nothing is closed without your confirmation. The extension never closes tabs automatically. Your data stays on your computer: - No data leaves your computer. All work happens locally in your browser. - The extension makes no network requests. Site icons come from the browser's own icon cache. - Tab addresses and titles are not saved. Only window IDs and times (to know which window you used last) are kept in memory and are deleted when the browser closes. - No accounts, no analytics, no ads. About the "Read your browsing history" warning: the browser shows this warning because the extension reads the addresses and titles of your open tabs. It needs them to find duplicates. It does not read your history. Developed with ❤️ by CYBERDYNE SRL. Visit us at: https://cyberdyne-srl.com/ or https://cyberdyne-srl.de/