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Duplicate in Tab Context Menu
Effortlessly duplicate tabs from the tab context menu with this add-on for Firefox...
Tabberwocky
Tabberwocky is the successor to superT...
Duplicate This Tab
Features Supported include Duplication of Browser Tabs, Detaching Tabs and Merging All Windows...
Duplicate This Tab for Firefox
Features Supported include Duplication of Browser Tabs, Detaching Tabs and Merging All Windows...