This past month I've encountered a few people that didn't know about the Debug menu that is available in Safari. Granted, for most engineers it won't be of any use, but for some it will be invaluable.
- Open up the terminal (Mac OSX)
- Enter the following and hit enter:
defaults write com.apple.Safari -IncludeInternalDebugMenu 1
- Restart/Open Safari
Note: This can be undone by changing 1 to 0 in the above command followed by a restart of Safari.