This is a character multiplier, a clipboard, and a desired wikipedia window spawner, all on your current tab.
Start by selecting any arbitrary text, and work with the popup and your context menu in order to either multiply your text as many times as you want, or add your text to a clipboard that allows you to edit, copy and delete your clips, or spawn a Wikipedia window about your text, who's dimensions can be changed prior to spawning.
(On Mac OS, in order for the Wikipedia window to spawn correctly, make sure that your tab is not in full screen).