Open up Chrome and click the dotted icon in the top right corner of the window. Then More tools > Developer tools (F12 or Ctrl + Shift + I).
Next, click the dotted icon in the top right corner of the tools pane. And then Run command (Ctrl + Shift + P).
Finally click Capture full size screenshot in the list of commands. A full size screenshot of the current website will be saved to your Downloads directory.