True fullscreen browser display I confess I'm not a regular Mac user so apologies in advance if this is a stupid question.

I'm building a web page to be displayed (offline) as a projection on a wall. On the Windows PC, running Firefox in full screen mode (F11) gives me exactly the desired effect -- no toolbars or other distractions, just the web page filling the entire display.

Over on the Mac (v10.8.5) I've tried getting this effect in both Safari and Firefox. On Firefox I got stuck because I couldn't figure out how to hide the navigation bar (yes, I do feel stupid).

On Safari I can manually get rid of all the toolbars but even after that I'm still stuck with a bright white line across the top of the display where the menu bar would appear were I to drag the mouse up there.

I'm after a solution that doesn't require installing add-ons or other software (this isn't my machine) and that is as low-hassle as possible (non-techy folks will be setting it up each day). I might get away with something that can be run off a USB stick if that helps.
This is actually a lot easier in OSX El Capitan now because there is an option to not show the toolbar in fullscreen mode.

However, in Lion, I believe you can still do this:


Enter Full Screen mode
Secondary click on the grey area above the address bar and choose "Hide Toolbar" in the Contextual Menu displayed.


That should get you what you need.