Full screen at startup


I am making a screen presentation based on a Flash movie.
I am using a 42" LED screen and a Rikomagic Android 4,1 mini PC.
To run Flash from the internet i use Firefox.
I want to fully automate the startup proces so i use Tasker to start Firefox and a plug-in in Firefox, to enter full screen mode.
What i can't do, is to open a certain webpage at startup and hide the menu bar in the buttom of the screen. Can anyone tell me if this is possible with Tasker or in any other way.

Thanks in advance...