Examine source code of Soymilk

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Soymilk",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(255, 250, 245)",
      "toolbar_text": "rgba(70, 110, 255, 0.8)",
      "frame": "rgb(255, 250, 245)",
      "tab_background_text": "rgb(119, 144, 255)",
      "toolbar_field": "rgb(255, 250, 245)",
      "toolbar_field_text": "rgba(252, 60, 72, 0.6)",
      "tab_line": "rgba(255, 100, 110, 0)",
      "popup": "rgb(255, 250, 245)",
      "popup_text": "rgba(70, 110, 255, 0.8)",
      "icons": "rgba(70, 110, 255, 0.8)",
      "ntp_background": "rgb(255, 250, 245)",
      "popup_border": "rgb(255, 250, 245)",
      "popup_highlight_text": "rgba(70, 110, 255, 0.8)",
      "popup_highlight": "rgb(255, 250, 245)",
      "sidebar_border": "rgb(255, 250, 245)",
      "sidebar_highlight_text": "rgba(70, 110, 255, 0.8)",
      "sidebar_highlight": "rgba(120, 145, 255, 0.4)",
      "sidebar_text": "rgba(70, 110, 255, 0.8)",
      "sidebar": "rgb(255, 250, 245)",
      "tab_background_separator": "rgba(252, 60, 72, 0.6)",
      "tab_selected": "rgba(255, 75, 85, 0.6)",
      "tab_text": "rgb(255, 250, 245)",
      "toolbar_bottom_separator": "rgb(255, 250, 245)",
      "toolbar_field_highlight_text": "rgb(255, 250, 245)",
      "toolbar_field_highlight": "rgba(252, 60, 72, 0.6)",
      "toolbar_field_separator": "rgb(255, 250, 245)",
      "toolbar_field_text_focus": "rgba(70, 110, 255, 0.8)",
      "toolbar_top_separator": "rgb(255, 250, 245)",
      "toolbar_vertical_separator": "rgb(255, 250, 245)",
      "tab_loading": "rgba(255, 100, 110, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{64a3e0ac-5981-4786-b345-db6eec2252ed}"
    }
  }
}