Examine source code of r34 theme

{
  "name": "r34 theme",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "topb.png"
    },
    "colors": {
      "frame": "rgba(170, 230, 166, 1)",
      "tab_background_text": "rgba(0, 0, 153, 1)",
      "toolbar": "rgba(147, 195, 147, 1)",
      "bookmark_text": "rgba(0, 0, 153, 1)",
      "toolbar_field": "rgba(255, 255, 255, 1)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2126b809-53e1-4a25-ba9d-b16c4f82a1cf}"
    }
  }
}