Examine source code of SteamFoxUI

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "SteamFox",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(42, 71, 94)",
      "toolbar_text": "rgb(199, 213, 224)",
      "frame": "rgb(27, 40, 56)",
      "tab_background_text": "rgb(79, 148, 188)",
      "toolbar_field": "rgb(49, 98, 130)",
      "toolbar_field_text": "rgb(238, 238, 238)",
      "tab_line": "rgb(40, 66, 89)",
      "popup": "rgb(169, 205, 226)",
      "popup_text": "rgb(38, 54, 69)",
      "button_background_active": "rgb(34, 57, 75)",
      "button_background_hover": "rgb(34, 57, 75)",
      "icons_attention": "rgb(190, 238, 17)",
      "icons": "rgb(102, 192, 244)",
      "ntp_background": "rgb(23, 26, 33)",
      "ntp_text": "rgb(197, 195, 192)",
      "popup_border": "rgb(169, 205, 226)",
      "popup_highlight_text": "rgb(0, 120, 218)",
      "popup_highlight": "rgb(255, 255, 255)",
      "sidebar_border": "rgb(49, 98, 130)",
      "sidebar_highlight_text": "rgb(0, 120, 218)",
      "sidebar_highlight": "rgb(255, 255, 255)",
      "sidebar_text": "rgb(238, 238, 238)",
      "sidebar": "rgb(49, 98, 130)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_bottom_separator": "rgb(42, 71, 94)",
      "toolbar_field_border_focus": "rgb(76, 154, 204)",
      "toolbar_field_border": "rgb(34, 68, 91)",
      "toolbar_field_highlight_text": "rgb(0, 120, 218)",
      "toolbar_field_highlight": "rgb(255, 255, 255)",
      "toolbar_vertical_separator": "rgba(187, 0, 0, 0)",
      "tab_loading": "rgb(40, 66, 89)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{660804e1-5398-4b98-a96d-5cd700e3fbf7}"
    }
  }
}