No issues here.

You can set Firefox to full screen by using the keyboard shortcut F11 or by pressing the Firefox menu and clicking the full screen button in the Zoom section.

This in No Way Solves the problem as I do it Every Time I Open Firefox. I am still left with an Address Bar Across the Top of my Screen in Every Game. The resulting Game is forced into a Narrow Box. And I know for a Fact that Hundreds of Other People have Made the Same Complaint. I Read the Complaints Issued Every Day about this problem concerning the New Firefox Menu.

On Windows? Make sure the cursor is not in the address bar when you press F11 because then the address bar needs to continue to be displayed. Press F6 to switch the focus from the address bar to the page before pressing F11 and see whether that helps.

Pressing F6 before or even after pressing F11 Makes the Address Bar Light Up and Assume Control. In every other browser that I use or have used, when I want Full Screen. That is what I get, not some compromise.

If the Navigation Toolbar and Tab bar aren't hidden if you enter Full Screen mode then right-click empty toolbar area and tick "Hide Toolbars".

Can you attach a screenshot?

• https://support.mozilla.org/en-US/kb/how-do-i-create-screenshot-my-problem
• use a compressed image type like PNG or JPG to save the screenshot

Here is a Screen Shot of my computer terminal with Full Screen Enabled. And there is No Option available to Hide the Toolbars anywhere after Right Clicking.

Thank you for the screenshot.

The unwanted bar looks like part of the page. Firefox's full screen feature only hides the browser user interface, not any parts of the page.

But there seems to be a full screen button inside the game itself. Is the problem with that button not working any more? Can you tell whether it's a Flash game?

The game is written in HTML5 and uses No Flash and the Firefox Browser has Disabled All Screen Modifications.