YESSSSSSSSSSSSSSSS!!!

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.

"Accidental fail" is the thing that would happen often. Two opposite actions, stop and reload, placed on one button. I'd rather give user two straightforward buttons, than one complex and modal.

Agreed. Merging stop and the spinner makes sense, but merging with reload none at all.

At least give me the option to customize the toolbar so I can put the buttons wherever I want.

Sure. You install the "Stylish" extension and then you use CSS to customize to your heart's content. This IS Firefox. I have all the chrome hidden when inactive.

Though Mozilla gimps the easy customizability more and more with each release.

For instance, starting in Firefox 3, the location bar and search bar are a single integrated UI element, for no apparent reason.