Examine source code of Ember

{
  "name": "Ember",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "PurOrgGradientDark.png"
    },
    "colors": {
      "frame": "rgba(129, 3, 255, 1)",
      "tab_background_text": "rgba(205, 160, 255, 1)",
      "toolbar": "rgba(61, 19, 133, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(100, 25, 160, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 75, 65, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a98fc199-6087-40bf-a656-f484c908811b}"
    }
  }
}