Examine source code of first try

{
  "name": "first try",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "obey-backgrounds.jpg"
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0.55)",
      "toolbar_field": "rgba(252, 252, 252, 0.34)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "frame": "rgba(232, 39, 39, 0.65)",
      "tab_background_text": "rgba(245, 242, 242, 0.84)",
      "bookmark_text": "rgba(255, 255, 255, 0.78)"
    }
  }
}