Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to create more screen space in firefox [title] Use small icons! [title] Use keyboard shortcuts. [step] For example, the full screen shortcut is f11. If you know this shortcut you can remove the " full screen " button, if you have any.

Ending1: [title] Use the user guide if you want to create more icons. [step] The user guide gives you you a preview of where you are right now. Ending2: [title] Enable virtually all open firefox tabs. [title] Right click the tab and select properties. Ending3: If not, simply click the small icon and choose shortcuts e.g " one small icon " [title] Open the show me taskbar and select a picture. [title] On the picture page, use your mouse to control the icons. Ending4: [title] Uninstall addons and toolbars you don't need. [step] Navigate to about: addons and manage them from there.

Answer format: ending1/ending2/ending3/ending4