Examine source code of leaves--

{
  "theme": {
    "images": {
      "theme_frame": "leaves.png"
    },
    "colors": {
      "frame": "#735b33",
      "tab_background_text": "#fcfac2"
    }
  },
  "version": "2.0",
  "name": "leaves--",
  "manifest_version": 2,
  "description": "automne, autumn, feuilles, leaves, animal, bird, oiseau, cerf, deer, chouette, hibou, owl, craft, fall colors, chilhood"
}