Examine source code of Soft Green

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Soft Green",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-039-717a66ba4d455686088c80f391cb3264.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(230, 241, 217)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(251, 250, 221)",
      "tab_background_text": "rgb(0, 0, 0)",
      "toolbar_field": "rgba(255, 255, 255, 0)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(139, 35, 129)",
      "popup": "rgb(236, 220, 249)",
      "popup_text": "rgb(0, 0, 0)",
      "tab_loading": "rgb(139, 35, 129)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{53b3cf2c-a2a9-4039-9965-2bbd1ccf2115}"
    }
  }
}