Examine source code of Tomato Look

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Tomato",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-002-609370e89a219e0548ac5ef6b4a7dd2e.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(229, 111, 111, 0.86)",
      "toolbar_text": "rgb(242, 242, 242)",
      "frame": "rgb(180, 61, 65)",
      "tab_background_text": "rgb(207, 204, 197)",
      "toolbar_field": "rgba(255, 255, 255, 0.21)",
      "toolbar_field_text": "rgb(105, 32, 32)",
      "tab_line": "rgb(255, 255, 255)",
      "popup": "rgb(234, 235, 246)",
      "popup_text": "rgba(0, 0, 0, 0.63)",
      "tab_loading": "rgb(255, 255, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f0ca0286-4143-4b22-b078-4e1f2be13728}"
    }
  }
}