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I no longer have any toolbars, address bar or any access to any usual functions. How can I restore these functions in my browser?

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All functions are gone from the top of my browser - no menu bar, no tool bars of any kind, no address bar... nothing. Right click or left click - nothing to use. How can I restore these common functions?

All functions are gone from the top of my browser - no menu bar, no tool bars of any kind, no address bar... nothing. Right click or left click - nothing to use. How can I restore these common functions?

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F11 to get you out of FullScreen mode?

If you hid the Menu bar and the Navigation bar - hit the Alt key to show the Menu bar, then open View > Toolbars and select Menu bar, so it has a check-mark.