Examine source code of Black dogs

{
  "name": "Black dogs",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "skin-chiens-pattes.jpg"
    },
    "colors": {
      "frame": "rgba(213, 214, 217, 1)",
      "tab_background_text": "rgba(245, 217, 117, 1)",
      "toolbar": "rgba(117, 115, 115, 0)",
      "bookmark_text": "rgba(245, 217, 117, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0.36)",
      "toolbar_field_text": "rgba(245, 223, 142, 1)"
    }
  }
}