Examine source code of Tide

{
  "manifest_version": 3,
  "name": "Tide",
  "version": "1.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "nova-tide@mozilla.org",
      "strict_min_version": "153.0"
    }
  },
  "theme": {
    "colors": {
      "frame": [
        235,
        244,
        245
      ],
      "frame_inactive": [
        215,
        224,
        225
      ],
      "toolbar": [
        255,
        255,
        255
      ],
      "toolbar_text": [
        1,
        28,
        35
      ],
      "icons": [
        3,
        69,
        84
      ],
      "icons_attention": [
        16,
        164,
        202
      ],
      "toolbar_top_separator": [
        0,
        0,
        0,
        0
      ],
      "toolbar_bottom_separator": [
        143,
        221,
        240
      ],
      "toolbar_vertical_separator": [
        143,
        221,
        240
      ],
      "tab_selected": [
        255,
        255,
        255
      ],
      "tab_text": [
        1,
        28,
        35
      ],
      "tab_background_text": [
        1,
        28,
        35
      ],
      "tab_line": [
        76,
        196,
        225
      ],
      "tab_loading": [
        76,
        196,
        225
      ],
      "tab_background_separator": [
        0,
        0,
        0,
        0.16
      ],
      "toolbar_field": [
        255,
        255,
        255
      ],
      "toolbar_field_text": [
        1,
        28,
        35
      ],
      "toolbar_field_border": [
        0,
        0,
        0,
        0.14
      ],
      "toolbar_field_focus": [
        255,
        255,
        255
      ],
      "toolbar_field_text_focus": [
        1,
        28,
        35
      ],
      "toolbar_field_separator": [
        0,
        0,
        0,
        0.16
      ],
      "sidebar": [
        255,
        255,
        255
      ],
      "sidebar_text": [
        1,
        28,
        35
      ],
      "sidebar_border": [
        143,
        221,
        240
      ],
      "sidebar_highlight": [
        195,
        238,
        248
      ],
      "button_background_hover": [
        195,
        238,
        248
      ],
      "button_background_active": [
        143,
        221,
        240
      ],
      "ntp_background": [
        235,
        244,
        245
      ]
    },
    "images": {
      "additional_backgrounds": [
        {
          "linear-gradient": "135deg, #EBF4F5 0%, #C3EEF8 60%, #8FDDF0 100%"
        }
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ],
      "additional_backgrounds_size": [
        "auto"
      ]
    }
  },
  "dark_theme": {
    "colors": {
      "frame": [
        1,
        28,
        35
      ],
      "frame_inactive": [
        0,
        14,
        21
      ],
      "toolbar": [
        29,
        27,
        31
      ],
      "toolbar_text": [
        235,
        244,
        245
      ],
      "icons": [
        235,
        244,
        245
      ],
      "icons_attention": [
        76,
        196,
        225
      ],
      "toolbar_bottom_separator": [
        0,
        45,
        56
      ],
      "toolbar_vertical_separator": [
        0,
        45,
        56
      ],
      "tab_selected": [
        29,
        27,
        31
      ],
      "tab_text": [
        235,
        244,
        245
      ],
      "tab_background_text": [
        235,
        244,
        245
      ],
      "tab_line": [
        6,
        96,
        119
      ],
      "tab_loading": [
        6,
        96,
        119
      ],
      "toolbar_field": [
        29,
        27,
        31
      ],
      "toolbar_field_text": [
        235,
        244,
        245
      ],
      "toolbar_field_border": [
        63,
        62,
        66
      ],
      "toolbar_field_focus": [
        39,
        36,
        41
      ],
      "toolbar_field_text_focus": [
        235,
        244,
        245
      ],
      "sidebar": [
        29,
        27,
        31
      ],
      "sidebar_text": [
        235,
        244,
        245
      ],
      "sidebar_border": [
        0,
        45,
        56
      ],
      "sidebar_highlight": [
        6,
        96,
        119
      ],
      "button_background_hover": [
        6,
        96,
        119
      ],
      "button_background_active": [
        10,
        128,
        159
      ],
      "ntp_background": [
        1,
        28,
        35
      ]
    },
    "images": {
      "additional_backgrounds": [
        {
          "linear-gradient": "135deg, #034554 0%, #002D38 60%, #011C23 100%"
        }
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ],
      "additional_backgrounds_size": [
        "auto"
      ]
    }
  }
}