Examine source code of Dark FF theme complet

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dark FF theme complet",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(7, 1, 0, 0.01)",
      "toolbar_text": "rgb(253, 199, 3)",
      "frame": "rgb(6, 0, 0)",
      "tab_background_text": "rgb(165, 121, 4)",
      "toolbar_field": "rgba(0, 0, 0, 0)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(253, 146, 3)",
      "popup": "rgb(6, 0, 0)",
      "popup_text": "rgb(253, 199, 3)",
      "button_background_active": "rgb(4, 24, 251)",
      "button_background_hover": "rgb(72, 56, 25)",
      "icons_attention": "rgb(23, 253, 3)",
      "icons": "rgb(3, 138, 253)",
      "popup_border": "rgb(4, 57, 251)",
      "tab_selected": "rgba(165, 152, 152, 0.69)",
      "tab_text": "rgb(248, 241, 241)",
      "toolbar_field_focus": "rgba(23, 2, 189, 0.02)",
      "toolbar_top_separator": "rgba(244, 236, 236, 0)",
      "tab_loading": "rgb(253, 146, 3)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{257768a9-d460-4c75-a189-2f870fcfdb24}"
    }
  }
}