Vertical Tabs in Internet Explorer

I am forced to use Internet Exploder lately, and I go literally mad with its non-customizeability of tabs: they are stuck on the top, stealing valuable vertical space.

As very well highlighted in this post:

http://pim.famnit.upr.si/blog/index.php?/archives/301-Web-browsers-on-Windows-OS-comparison-of-vertical-vs.-horizontal-tabs.html

the most ergonomic browser IMHO remains Firefox.