Examine source code of FX Killerwhale

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "FX Killerwhale",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(82, 82, 82)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(65, 65, 66)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(255, 255, 255, 0)",
      "popup": "rgb(66, 65, 77)",
      "popup_text": "rgb(255, 255, 255)",
      "icons_attention": "rgb(255, 210, 68)",
      "ntp_background": "rgb(36, 36, 36)",
      "ntp_text": "rgb(254, 254, 251)",
      "popup_border": "rgb(82, 82, 94)",
      "popup_highlight": "rgb(55, 56, 58)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_field_border_focus": "rgb(110, 110, 110)",
      "toolbar_field_focus": "rgb(32, 33, 36)",
      "tab_loading": "rgba(255, 255, 255, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{53a326f5-d2b0-44e3-8624-2994f72f1f2d}"
    }
  }
}