Rated 5 out of 5 stars

bởi mark84 vào Tháng 9. 12, 2010 · liên kết thường trực

For those wanting an updated version of this, someone has made an updated version called "Duplicate this tab".

Just a straight code copy but with latest browser support.
Link: https://addons.mozilla.org/en-US/firefox/addon/156490/