Extension called TabNavigator

Today's blog from below URL.

http://lifehacker.com/5349304/tabnavigator-brings-alt%252Btab-style-navigation-to-firefox

This blog said that you can set key combination for easy tab navigation in Firefox by extension called TabNavigator.
In addition that, you can check preview of other tabs easily.
It's interesting!!
I have been using browser called Firefox for 5 years and I have been using many web application too. So this extension would become very useful for me.

=====
[Corrected one]

Today's blog from below URL.

http://lifehacker.com/5349304/tabnavigator-brings-alt%252Btab-style-navigation-to-firefox

This blog said that you can set key combination for easy tab navigation in Firefox by extension called TabNavigator.
In addition to that, you can check preview of other tabs easily.
It's interesting!!
I  I have been using the browser called Firefox for 5 years and I have been
using many web application too. So this extension would become very
useful for me.