"in Firefox this effect activates when clicking the bar, while the other two enlarge when inputting data." This difference is why Firefox receives mores compla

"in Firefox this effect activates when clicking the bar, while the other two enlarge when inputting data." This difference is why Firefox receives mores complaints. When opening a new tab in Firefox, the address bar is automatically focused. This actually makes the address bar larger than the bounds of the encapsulating toolbar. This combined with the drop shadows helps to partially obscure adjacent toolbar(s), like the bookmarks toolbar.