Examine source code of Yellow

{
  "manifest_version": 2,
  "name": "Yellow",
  "author": "Mozilla",
  "version": "1.0",
  "theme": {
    "properties": {
      "color_scheme": "light"
    },
    "colors": {
      "icons": [
        156,
        82,
        0
      ],
      "icons_attention": [
        156,
        82,
        0
      ],
      "tab_background_text": [
        93,
        40,
        0
      ],
      "tab_text": [
        156,
        82,
        0
      ],
      "tab_selected": [
        255,
        255,
        255
      ],
      "tab_line": [
        241,
        175,
        0
      ],
      "tab_loading": [
        66,
        27,
        0
      ],
      "frame": [
        255,
        230,
        153
      ],
      "frame_inactive": [
        255,
        230,
        153
      ],
      "popup": [
        255,
        255,
        255
      ],
      "popup_text": [
        156,
        82,
        0
      ],
      "popup_border": [
        222,
        150,
        0
      ],
      "popup_highlight": [
        255,
        230,
        153
      ],
      "popup_highlight_text": [
        39,
        16,
        0
      ],
      "toolbar": [
        255,
        244,
        208
      ],
      "toolbar_text": [
        156,
        82,
        0
      ],
      "toolbar_field": [
        255,
        255,
        255
      ],
      "toolbar_field_border": [
        241,
        175,
        0
      ],
      "toolbar_field_border_focus": [
        181,
        103,
        0
      ],
      "toolbar_field_focus": [
        255,
        255,
        255
      ],
      "toolbar_field_text": [
        156,
        82,
        0
      ],
      "toolbar_top_separator": [
        241,
        175,
        0
      ],
      "toolbar_bottom_separator": [
        241,
        175,
        0
      ],
      "ntp_background": [
        255,
        244,
        208
      ],
      "ntp_card_background": [
        255,
        255,
        255
      ],
      "ntp_text": [
        66,
        27,
        0
      ],
      "sidebar": [
        255,
        255,
        255
      ],
      "sidebar_border": [
        222,
        150,
        0
      ],
      "sidebar_text": [
        156,
        82,
        0
      ],
      "sidebar_highlight": [
        255,
        230,
        153
      ]
    }
  },
  "dark_theme": {
    "properties": {
      "color_scheme": "dark"
    },
    "colors": {
      "icons": [
        245,
        204,
        88
      ],
      "icons_attention": [
        245,
        204,
        88
      ],
      "tab_background_text": [
        255,
        230,
        153
      ],
      "tab_text": [
        255,
        244,
        208
      ],
      "tab_selected": [
        93,
        40,
        0
      ],
      "tab_line": [
        119,
        56,
        0
      ],
      "tab_loading": [
        255,
        230,
        153
      ],
      "frame": [
        39,
        16,
        0
      ],
      "frame_inactive": [
        39,
        16,
        0
      ],
      "popup": [
        22,
        22,
        22
      ],
      "popup_text": [
        245,
        204,
        88
      ],
      "popup_border": [
        119,
        56,
        0
      ],
      "popup_highlight": [
        119,
        56,
        0
      ],
      "popup_highlight_text": [
        255,
        244,
        208
      ],
      "toolbar": [
        66,
        27,
        0
      ],
      "toolbar_text": [
        255,
        230,
        153
      ],
      "toolbar_field": [
        22,
        22,
        22
      ],
      "toolbar_field_border": [
        89,
        43,
        0
      ],
      "toolbar_field_border_focus": [
        199,
        128,
        0
      ],
      "toolbar_field_focus": [
        22,
        22,
        22
      ],
      "toolbar_field_text": [
        245,
        204,
        88
      ],
      "toolbar_top_separator": [
        89,
        43,
        0
      ],
      "toolbar_bottom_separator": [
        119,
        56,
        0
      ],
      "ntp_background": [
        66,
        27,
        0
      ],
      "ntp_card_background": [
        22,
        22,
        22
      ],
      "ntp_text": [
        255,
        230,
        153
      ],
      "sidebar": [
        22,
        22,
        22
      ],
      "sidebar_border": [
        119,
        56,
        0
      ],
      "sidebar_text": [
        245,
        204,
        88
      ],
      "sidebar_highlight": [
        119,
        56,
        0
      ]
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{cd6791f7-4b6d-47b4-8877-1d4c82c6699d}"
    }
  }
}