Examine source code of Sunset Ember Theme

{
  "manifest_version": 2,
  "version": "1.0.0",
  "name": "Sunset Ember Theme",
  "description": "A warm Firefox theme with sunset and ember gradients. Includes light and dark variations with unique 5120×200 headers.",
  "theme": {
    "images": {
      "theme_frame": "header_light.png"
    },
    "colors": {
      "frame": "#FF8C00",
      "tab_background_text": "#111111",
      "toolbar": "#FFFFFF",
      "toolbar_text": "#111111",
      "icons": "#111111",
      "icons_attention": "#EA580C",
      "button_background_active": "#FED7AA",
      "button_background_hover": "#FFEDD5"
    },
    "properties": {
      "color_scheme": "light"
    }
  },
  "dark_theme": {
    "images": {
      "theme_frame": "header_dark.png"
    },
    "colors": {
      "frame": "#800000",
      "tab_background_text": "#FFFFFF",
      "toolbar": "#1C0A0A",
      "toolbar_text": "#FFFFFF",
      "icons": "#FFFFFF",
      "icons_attention": "#F87171",
      "button_background_active": "#7F1D1D",
      "button_background_hover": "#991B1B"
    },
    "properties": {
      "color_scheme": "dark"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f0c8ed02-82e9-468f-8a78-a55e4486b24c}"
    }
  }
}