I never understood why you would want it all the way to the right... anyone care to explain? Is it just because that's how it was in the beginning?

I personally think most links I click relate to the current tab, so naturally i would want them next to the current tab.
> To fix Firefox 3.6's annoying tab behavior:
>
> Make New Tab Pages Open in the Far Right of the Tab BarType about:config in the
> address bar. Then, if needed click the “I’ll be careful, I promise!” button.
>
> Next, in the filter box – type in:
> tabs.insertRelatedAfterCurrent
>
> Right-click that about:config entry, and select “Toggle”
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