Examine source code of yogurt-rb9

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "yogurt",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(252, 181, 167)",
      "toolbar_text": "rgb(46, 52, 54)",
      "frame": "rgb(174, 116, 154)",
      "tab_background_text": "rgb(21, 24, 25)",
      "toolbar_field": "rgb(166, 199, 180)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(7, 0, 17)",
      "popup": "rgb(182, 161, 202)",
      "popup_text": "rgb(0, 0, 0)",
      "button_background_hover": "rgb(182, 161, 202)",
      "popup_highlight_text": "rgb(46, 52, 54)",
      "popup_highlight": "rgb(208, 243, 221)",
      "tab_selected": "rgb(221, 198, 216)",
      "tab_text": "rgb(64, 63, 64)",
      "tab_loading": "rgb(7, 0, 17)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{67e9157d-207c-4ed3-a7c0-0bbd314bc56d}"
    }
  }
}