Examine source code of Ashfern

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Gruvy",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-031-9570e8d1f7a5f835c92e764693337f43.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(100, 92, 85)",
      "toolbar_text": "rgb(220, 200, 182)",
      "frame": "rgb(80, 74, 70)",
      "tab_background_text": "rgb(220, 200, 182)",
      "toolbar_field": "rgb(59, 56, 54)",
      "toolbar_field_text": "rgb(220, 200, 182)",
      "tab_line": "rgb(151, 137, 125)",
      "popup": "rgb(220, 200, 182)",
      "popup_text": "rgb(0, 0, 0)",
      "frame_inactive": "rgb(40, 40, 40)",
      "popup_border": "rgb(40, 40, 40)",
      "toolbar_field_border_focus": "rgb(122, 111, 101)",
      "toolbar_field_highlight_text": "rgb(167, 210, 194)",
      "toolbar_field_highlight": "rgb(7, 102, 120)",
      "tab_loading": "rgb(151, 137, 125)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{aec36acd-36d9-42ee-8bb1-70d1bffbddf9}"
    }
  }
}