Examine source code of Regular Show BG

{
  "name": "Regular Show BG",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Regular Show Header for Firefox.png"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 0.65)",
      "tab_background_text": "rgba(255, 255, 255, 0.3)",
      "toolbar": "rgba(255, 255, 255, 0.05)",
      "bookmark_text": "rgba(168, 168, 168, 1)",
      "toolbar_field": "rgba(255, 255, 255, 0.15)",
      "toolbar_field_text": "rgba(227, 195, 13, 1)",
      "tab_line": "rgba(152, 116, 207, 0.25)"
    }
  }
}