Competition vs Safari vs Mozilla Firefox vs Google Chrome

Saving File As... option would be very convenient
Safari: No such choice
Firefox: No, gives no choice
Chrome: No such choice either

How fast can you disable the history logging PERMANENTLY:
1st place: Firefox: File / Preferences... / Privacy / Firefox will ... [choose: Never remember history]
2nd place: Safari: Safari / Private Browsing - will enable something like chrome's incognito mode, but no permanently disabling history settings unfortunately. Here some tip from macworld, on how to enable private browsing permanently with Apple Script - which is natively way easier than to do with Automator than finding the way to run Chrome's keys: http://www.macworld.com/article/1139714/enableprivatebrowsing.html - that's why safari gets 2nd place in this round
3rd place: Chrome: Only "Clear history" or Incognito mode is available (user have to figure out the way how to create shortcut with the --incognito keys in program running parameters in order to disable history permanently) - not good!

How fast could you remove bookmarks bar to see maximum space in full-screen mode (All of the three browsers support Command + Option + F hotkey to quit and enter full-screen mode):
1st place: Safari: has already optimized the space the way you can't remove bookmark toolbar but still lots of space in full-screen mode are saved.
2nd place: Chrome: Command + Option + B
3rd place: Firefox: You have to go thru "View" / "Toolbars" menu and manually remove the flags to remove two things from toolbar.