I accidentally found this “hidden” feature in Apple Safari 2.0.1 while messing with the “Debug” menu. For whatever reason, there’s a “Use Transparent Window” option under the Debug menu. In between page loads, the entire window goes transparent — a pretty cool effect.
To get to this feature, you first need to enable the Debug menu, which is hidden by default.
1. Quit Safari.
2. Open a terminal window.
3. Copy and paste
1 % defaults write com.apple.Safari IncludeDebugMenu 1
4. Launch Safari. You will find the new “Debug” menu option at the far right side of the menu bar.
You can read more about the Debug menu here.