Combo stop/refresh/go???
NOOOOOOOOOOOOOOOOO!!!
NOOOOOOOOOOOOOOOOO!!!
The Stop Button, Reload Button, and Indeterminate Progress Spinner all represent exactly the same thing -- whether the page is loading shit. You only need one, with a lag between stop and reload to avoid accidental fail.
They also finally put the progress bar in the address bar, another Safari innovation.
I've used TinyMenu + StopReload + Fission, along with shoving the few UI elements I want into the "File" toolbar to get this UI in FF for years.
For instance, starting in Firefox 3, the location bar and search bar are a single integrated UI element, for no apparent reason.