if you still have a gray bar left then do right click on it and add the bar that is missing. else do alt V - the menu bar will appear and you can add toolbars
You just need to right click at the bottom and select properties. It actually depends if you hide it or not. If you hide it, it will work as it will pop out again. If not, go to the control panel to...
if on a mac go to view then to toolbars then click which ever one you want back on if it is on there will be a check mark if on windows look for the tools option near the top of the browser and look...