Examine source code of Lagoon

{
  "manifest_version": 3,
  "name": "Lagoon",
  "version": "1.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "nova-lagoon@mozilla.org",
      "strict_min_version": "153.0"
    }
  },
  "theme": {
    "colors": {
      "frame": [
        236,
        243,
        248
      ],
      "frame_inactive": [
        216,
        223,
        228
      ],
      "toolbar": [
        255,
        255,
        255
      ],
      "toolbar_text": [
        17,
        21,
        36
      ],
      "icons": [
        35,
        50,
        123
      ],
      "icons_attention": [
        90,
        135,
        253
      ],
      "toolbar_top_separator": [
        0,
        0,
        0,
        0
      ],
      "toolbar_bottom_separator": [
        162,
        211,
        255
      ],
      "toolbar_vertical_separator": [
        162,
        211,
        255
      ],
      "tab_selected": [
        255,
        255,
        255
      ],
      "tab_text": [
        17,
        21,
        36
      ],
      "tab_background_text": [
        17,
        21,
        36
      ],
      "tab_line": [
        123,
        178,
        255
      ],
      "tab_loading": [
        123,
        178,
        255
      ],
      "tab_background_separator": [
        0,
        0,
        0,
        0.16
      ],
      "toolbar_field": [
        255,
        255,
        255
      ],
      "toolbar_field_text": [
        17,
        21,
        36
      ],
      "toolbar_field_border": [
        0,
        0,
        0,
        0.14
      ],
      "toolbar_field_focus": [
        255,
        255,
        255
      ],
      "toolbar_field_text_focus": [
        17,
        21,
        36
      ],
      "toolbar_field_separator": [
        0,
        0,
        0,
        0.16
      ],
      "sidebar": [
        255,
        255,
        255
      ],
      "sidebar_text": [
        17,
        21,
        36
      ],
      "sidebar_border": [
        162,
        211,
        255
      ],
      "sidebar_highlight": [
        197,
        234,
        254
      ],
      "button_background_hover": [
        197,
        234,
        254
      ],
      "button_background_active": [
        162,
        211,
        255
      ],
      "ntp_background": [
        236,
        243,
        248
      ]
    },
    "images": {
      "additional_backgrounds": [
        {
          "linear-gradient": "135deg, #ECF3F8 0%, #C5EAFE 60%, #A2D3FF 100%"
        }
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ],
      "additional_backgrounds_size": [
        "auto"
      ]
    }
  },
  "dark_theme": {
    "colors": {
      "frame": [
        17,
        21,
        36
      ],
      "frame_inactive": [
        5,
        8,
        22
      ],
      "toolbar": [
        29,
        27,
        31
      ],
      "toolbar_text": [
        236,
        243,
        248
      ],
      "icons": [
        236,
        243,
        248
      ],
      "icons_attention": [
        162,
        211,
        255
      ],
      "toolbar_bottom_separator": [
        23,
        33,
        76
      ],
      "toolbar_vertical_separator": [
        23,
        33,
        76
      ],
      "tab_selected": [
        29,
        27,
        31
      ],
      "tab_text": [
        236,
        243,
        248
      ],
      "tab_background_text": [
        236,
        243,
        248
      ],
      "tab_line": [
        50,
        70,
        176
      ],
      "tab_loading": [
        50,
        70,
        176
      ],
      "toolbar_field": [
        29,
        27,
        31
      ],
      "toolbar_field_text": [
        236,
        243,
        248
      ],
      "toolbar_field_border": [
        63,
        62,
        66
      ],
      "toolbar_field_focus": [
        39,
        36,
        41
      ],
      "toolbar_field_text_focus": [
        236,
        243,
        248
      ],
      "sidebar": [
        29,
        27,
        31
      ],
      "sidebar_text": [
        236,
        243,
        248
      ],
      "sidebar_border": [
        23,
        33,
        76
      ],
      "sidebar_highlight": [
        50,
        70,
        176
      ],
      "button_background_hover": [
        50,
        70,
        176
      ],
      "button_background_active": [
        69,
        95,
        231
      ],
      "ntp_background": [
        17,
        21,
        36
      ]
    },
    "images": {
      "additional_backgrounds": [
        {
          "linear-gradient": "135deg, #23327B 0%, #17214C 60%, #111524 100%"
        }
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ],
      "additional_backgrounds_size": [
        "auto"
      ]
    }
  }
}