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You can define where and how you want the duplicate tab to appear: The tab can be placed next to the original or at the end of the tab bar, and can be focussed or kept in the background so you can keep reading in the original tab, while the duplicate is being loaded.
Further more, there is an option which allows you to open a link in a duplicate tab when middle clicking on the link.
And an option to open middle clicked items from the drop down menus of the back and forward toolbar buttons in a duplicate tab.
Also, under Advanced Options there are options to select what to clone when a tab is duplicated. back to top
Selecting tabs for merging (ctrl+click) will add "(*)" in front of the tab's title, to indicate that the tab has been selected. back to top
You can select if you want to merge all windows, or if you want to merge only the top window with the one below that.
Also you can select if you want to take along popup windows while merging and eventually place them next to the tabs the popups originate from (only in Firefox 1.5 / Seamonkey 1.0b).
When you select tabs for merging, by default the window containing those tabs will be closed after the selected tabs have been merged. When at that moment the window still contains some tabs, a warning will pop up that those tabs are about to be lost. If you don't want that warning showing up or you want the window not to be closed, you can change that in the options dialog. back to top
If you only use one or two menu items, or you don't like to use submenus, you can set to not show the submenu and then you can select which menu items you want to have available. back to top
You can also choose to not place the content's context menu items in a submenu, and to only display some of the menu items. back to top
You can Shift+Drag a tab to duplicate it. The arrow normally indicating where a tab will be moved to, has a little plus sign on it to indicate that the tab will be duplicated. The duplicate tab will be placed at the position the arrow is pointing at. back to top
As of Duplicate Tab 0.5 you can open a link in a duplicated tab; the current tab is duplicated to a new tab and the link is opened in that tab, so the history of the original tab is also available in the new tab.
While as of Duplicate Tab 0.6.1 you can also do this by Ctrl + middle clicking on a link. Or if you prefer you want to open the link in a duplicated tab in a new window, you can also Ctrl + Shift + middle click on that link.
To add the toolbar buttons to a toolbar select View->Toolbars->Costumize..., which brings up the Costimize Toolbar window. From that window you can drag the buttons to a toolbar. back to top