firefox browser settings to avoid appearance of menu bar or task bar in full screen when pointing mouse on the top of the screen

Question

I am using firefox 3.0 in rhel6.2.Wwhen I press F11, the fullscreen mode appears, but if the mouse pointer goes to the top of the screen at fulscreen mode then the task bar appears. I want to avoid the appearance of this bar. I have searched the net but got the answers how to show them in full screen. Please suggest me the settings I need to do.

Answer 1

Go to ~/.mozilla/firefox/<profile folder>/chrome/ (check in profiles.ini which profile you are using), and put this piece of code in userChrome.css (create one if it doesn't exist)

/* only needed once */
@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");

#fullscr-toggler { display:none!important; }

Source: https://support.mozilla.org/en-US/questions/942904

Answer 2

Open Firefox and type about:config in the addressbar and press Enter. It'll confirm, click on I'll be careful, I promise! button.

Now type autohide in the Filter box and look for following boolean key:

browser.fullscreen.autohide

The entry "browser.fullscreen.autohide" would be set to true. Double-click on it and change its value to false.