I have to say, I really don’t understand why people are upset about this. I love the feature, esp. when used with the keyboard shortcut (Ctrl+Shift+A), because I am a user who typically has many tabs open. If I need to find a specific tab, a quick keypress and type a few chars and I can find it, even if I have hundreds of tabs open.
And if I need to go back and forth between tabs I can hit the key combo and use the arrows; again, very fast. Many people have been dying for this capability to be ported from Firefox; well, here it is (albeit implemented differently).
I don’t disagree that it would be nice to be able to disable it if you don’t want it, don’t use it, etc. But it does have a purpose that some people find quite useful, and its presence can actually obviate the need for an extension to deal with this.