Comment by dgut

If you set the width/height to 12px, set the image's left padding to 0, and center things vertically with flex, it looks significantly better.

  image.width = 12
  image.height = 12
  image.style.marginRight = '0.25em'
  //image.style.paddingRight = '0.25em'
  //image.style.paddingLeft = '0.25em'

  document.querySelectorAll('.athing > td:nth-child(3), .titlelink').forEach(e => { 
    e.style.display = 'flex',
    e.style.alignItems = 'center',
    e.style.marginRight = '0.25em'
  })

Screenshot: https://imgur.com/BN2wHgo