Examine source code of Foxyglow

{
  "manifest_version": 2,
  "applications": {
    "gecko": {
      "id": "aveyo@yahoo.com"
    }
  },
  "name": "FoxyGlow",
  "description": "Based on Alpenglow, easier on the eyes",
  "version": "1.0",
  "icons": {
    "32": "icon.svg"
  },
  "theme": {
    "images": {
      "additional_backgrounds": [
        "background-noodles-right.svg",
        "background-noodles-left.svg",
        "background-gradient.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top",
        "left top",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "no-repeat",
        "repeat-x"
      ]
    },
    "colors": {
      "frame": "rgba(255, 240, 230, 1)",
      "toolbar": "rgba(251, 249, 250, 0.5)",
      "button_background_active": "rgba(251, 110, 75, 0.64)",
      "button_background_hover": "rgba(251, 110, 75, 0.96)",
      "icons": "rgba(0, 0, 0, 0.96)",
      "icons_attention": "rgba(10, 132, 255, 1)",
      "toolbar_text": "rgba(0, 0, 0, 1)",
      "toolbar_vertical_separator": "rgba(38, 18, 38, 0.2)",
      "toolbar_field": "rgba(255, 240, 230, 0.64)",
      "toolbar_field_focus": "rgba(255, 240, 230, 0.8)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "toolbar_field_text_focus": "rgba(239, 224, 239, 1)",
      "toolbar_field_border": "rgba(183, 112, 183, 0.32)",
      "toolbar_field_border_focus": "rgba(183, 112, 183, 0.32)",
      "toolbar_field_highlight": "rgba(251, 110, 75, 0.64)",
      "toolbar_field_highlight_text": "rgba(0, 0, 0, 1)",
      "toolbar_field_separator": "rgba(38, 18, 38, 0.32)",
      "toolbar_top_separator": "rgba(38, 18, 38, 1)",
      "toolbar_bottom_separator": "rgba(38, 18, 38, 0.32)",
      "bookmark_text": "rgba(38, 18, 38, 1)",
      "tab_text": "rgba(43, 38, 49, 1)",
      "tab_background_text": "rgba(38, 18, 38, 1)",
      "tab_background_separator": "rgba(38, 18, 38, 1)",
      "tab_line": "rgba(118, 67, 229, 0.96)",
      "tab_loading": "rgba(283, 112, 183, 1)",
      "ntp_background": "rgba(254, 237, 225, 1)",
      "ntp_text": "rgba(38, 18, 38, 1)",
      "popup": "rgba(255, 240, 230, 1)",
      "popup_text": "rgba(0, 0, 0, 1)",
      "popup_border": "rgba(239, 224, 239, 0.32)",
      "popup_highlight": "rgba(118, 67, 229, 0.4)",
      "popup_highlight_text": "rgba(0, 0, 0, 1)",
      "sidebar": "rgba(255, 240, 230, 1)",
      "sidebar_text": "rgba(0, 0, 0, 1)",
      "sidebar_border": "rgba(38, 18, 38, 0.24)",
      "sidebar_highlight": "rgba(118, 67, 229, 0.4)",
      "sidebar_highlight_text": "rgba(0, 0, 0, 1)"
    }
  },
  "dark_theme": {
    "images": {
      "additional_backgrounds": [
        "background-noodles-right-dark.svg",
        "background-noodles-left-dark.svg",
        "background-gradient-dark.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top",
        "left top",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "no-repeat",
        "repeat-x"
      ]
    },
    "colors": {
      "frame": "rgba(43, 38, 49, 1)",
      "toolbar": "rgba(44, 33, 55, 0.5)",
      "button_background_active": "rgba(251, 110, 75, 0.64)",
      "button_background_hover": "rgba(251, 110, 75, 0.96)",
      "icons": "rgba(255, 240, 230, 0.96)",
      "icons_attention": "rgba(10, 132, 255, 1)",
      "toolbar_text": "rgba(255, 240, 230, 1)",
      "toolbar_vertical_separator": "rgba(255, 138, 255, 0.32)",
      "toolbar_field": "rgba(64, 45, 82, 1)",
      "toolbar_field_focus": "rgba(43, 38, 49, 0.8)",
      "toolbar_field_text": "rgba(255, 240, 230, 1)",
      "toolbar_field_text_focus": "rgba(239, 224, 239, 1)",
      "toolbar_field_border": "rgba(183, 112, 183, 0.32)",
      "toolbar_field_border_focus": "rgba(183, 112, 183, 0.32)",
      "toolbar_field_highlight": "rgba(251, 110, 75, 0.64)",
      "toolbar_field_highlight_text": "rgba(251, 249, 250, 1)",
      "toolbar_field_separator": "rgba(59, 18, 59, 0.32)",
      "toolbar_top_separator": "rgba(118, 67, 229, 0.96)",
      "toolbar_bottom_separator": "rgba(116, 52, 116, 0.96)",
      "bookmark_text": "rgba(255, 240, 230, 1)",
      "tab_text": "rgba(251, 249, 250, 1)",
      "tab_background_text": "rgba(255, 240, 230, 1)",
      "tab_background_separator": "rgba(255, 240, 230, 0.96)",
      "tab_line": "rgba(118, 67, 229, 0.96)",
      "tab_loading": "rgba(0, 255, 0, 1)",
      "ntp_background": "rgba(38, 35, 42, 1)",
      "ntp_text": "rgba(255, 240, 230, 1)",
      "popup": "rgba(43, 38, 49, 1)",
      "popup_text": "rgba(255, 240, 230, 1)",
      "popup_border": "rgba(255, 240, 230, 0.2)",
      "popup_highlight": "rgba(118, 67, 229, 0.64)",
      "sidebar": "rgba(43, 38, 49, 1)",
      "sidebar_text": "rgba(255, 240, 230, 1)",
      "sidebar_border": "rgba(255, 240, 230, 0.2)",
      "sidebar_highlight": "rgba(118, 67, 229, 0.4)",
      "sidebar_highlight_text": "rgba(251, 249, 250, 1)"
    }
  }
}