在 Opera 之前的 Netcapor 就有分頁功能了。

http://en.wikipedia.org/wiki/Tab_%28GUI%29
Four years later, in 1994, BookLink Technologies featured tabbed windows in its InternetWorks browser. That same year, a text editor called UltraEdit also appeared with a modern multi-row tabbed interface. The tabbed interface approach was then followed by the Internet Explorer shell NetCaptor in 1997. These were followed by a number of others like IBrowse in 1999, and Opera in 2000 (with the release of version 4 - although a MDI interface was supported before then), MultiViews October 2000, which changed its name into MultiZilla on 1 April 2001 (an extension for the Mozilla Application Suite[7]), Mozilla 0.9.5 in October 2001, Phoenix 0.3 (now Mozilla Firefox) in October 2002, Konqueror 3.1 in January 2003, and Safari in 2003. With the release of Internet Explorer 7 in 2006, all major web browsers featured a tabbed interface. Avant Browser, Enigma Browser, and Maxthon are some of the most popular tabbed browsers using Internet Explorer's layout engine Trident.