Examine source code of Rustic artisan

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Rustic artisan",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-017-7074520d97b5c592d413aed5f115f093.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(170, 88, 22)",
      "toolbar_text": "rgb(255, 136, 54)",
      "frame": "rgb(207, 113, 54)",
      "tab_background_text": "rgb(90, 58, 200)",
      "toolbar_field": "rgb(232, 155, 92)",
      "toolbar_field_text": "rgb(2, 10, 153)",
      "tab_line": "rgb(230, 212, 11)",
      "popup": "rgb(251, 190, 144)",
      "popup_text": "rgb(98, 102, 183)",
      "button_background_active": "rgb(177, 163, 255)",
      "button_background_hover": "rgb(241, 145, 30)",
      "frame_inactive": "rgb(219, 172, 112)",
      "icons_attention": "rgb(241, 7, 61)",
      "icons": "rgb(51, 12, 236)",
      "ntp_background": "rgb(174, 114, 40)",
      "ntp_text": "rgb(181, 107, 9)",
      "popup_border": "rgb(237, 231, 8)",
      "popup_highlight": "rgb(237, 231, 8)",
      "sidebar_highlight": "rgb(255, 150, 9)",
      "tab_loading": "rgb(230, 212, 11)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f5f04d22-9699-49b7-a552-e1d576b8ef3d}"
    }
  }
}