Chromium Extension to Duplicate Tab, Pop out current Tab, and add New Tab to the Right. You can configure the shortcuts at chrome://extensions/shortcuts
Chrome Web Store: https://chrome.google.com/webstore/detail/tab-shortcut-tools/ecfmgmpggijgmnjolmaegkhkcdkbookp
Screenshot
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It is a fork of: https://github.com/stefansundin/duplicate-tab
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Icon Source: http://findicons.com/icon/208731/copy