I close them often, middle-click on the header or Ctrl+W. I also miss opera's hotkey to close all tabs except the active one. When I'm doing some research wher

I close them often, middle-click on the header or Ctrl+W. I also miss opera's hotkey to close all tabs except the active one. When I'm doing some research where I need lots of them at the same time, I use OneNote or sometimes Word to keep the links, adding a line or 2 of text about that link.