Paste and Go is an add-on which brings up a paste and go context menu when you right click on the address bar. This enables the URL in that is copied to be pasted and the browser automatically goes to the site based on the address, without the need for hitting the Enter or Go button.
In windows you can search for keyboard from start menu and open keyboard settings. Or you can go to Settings > Accessibility > Keyboard. In the keyboard settings window, toggle the switch that says "Use the Print screen button to open screen snipping". Hereafter whenever you press print screen button, you will be able to make a selection on the screen for a screenshot.