Examine source code of Space Drift

{
  "name": "Space Drift",
  "manifest_version": 2,
  "version": "7.1",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "button_background_active": "rgba(59, 33, 112, 0.75)",
      "button_background_hover": "rgba(59, 33, 112, 0.75)",
      "icons": "rgba(255, 255, 255, 0.75)",
      "icons_attention": "rgba(255, 0, 130, 1)",
      "frame": "rgba(59, 33, 112, 1)",
      "frame_inactive": "rgba(59, 33, 112, 1)",
      "ntp_background": "rgba(59, 33, 112, 1)",
      "ntp_text": "rgba(255, 255, 255, 1)",
      "popup": "rgba(59, 33, 112, 1)",
      "popup_border": "rgba(53, 29, 98, 0.75)",
      "popup_highlight": "rgba(255, 255, 255, 0.25)",
      "popup_highlight_text": "rgba(255, 255, 255, 1)",
      "popup_text": "rgba(255, 255, 255, 0.75)",
      "sidebar": "rgba(53, 29, 98, 1)",
      "sidebar_border": "rgba(53, 29, 98, 0.75)",
      "sidebar_highlight": "rgba(255, 255, 255, 0.25)",
      "sidebar_highlight_text": "rgba(255, 255, 255, 1)",
      "sidebar_text": "rgba(255, 255, 255, 0.75)",
      "tab_background_separator": "rgba(53, 29, 98, 1)",
      "tab_background_text": "rgba(255, 255, 255, 0.75)",
      "tab_line": "rgba(255, 0, 130, 1)",
      "tab_loading": "rgba(255, 0, 130, 1)",
      "tab_selected": "rgba(59, 33, 112, 0)",
      "tab_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(59, 33, 112, 0.5)",
      "toolbar_bottom_separator": "rgba(53, 29, 98, 0.75)",
      "toolbar_field": "rgba(59, 33, 112, 0.5)",
      "toolbar_field_border": "rgba(53, 29, 98, 0.75)",
      "toolbar_field_border_focus": "rgba(255, 0, 130, 1)",
      "toolbar_field_focus": "rgba(59, 33, 112, 0.5)",
      "toolbar_field_highlight": "rgba(255, 255, 255, 0.25)",
      "toolbar_field_highlight_text": "rgba(255, 255, 255, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 0.75)",
      "toolbar_field_text_focus": "rgba(255, 255, 255, 1)",
      "toolbar_text": "rgba(255, 255, 255, 0.75)",
      "toolbar_top_separator": "rgba(53, 29, 98, 0)",
      "toolbar_vertical_separator": "rgba(53, 29, 98, 0.75)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d931aebc-9d08-4eda-b61d-c6800797a3e9}"
    }
  }
}