Examine source code of Mochi Suga

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Mochi Suga",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(254, 243, 241, 0.19)",
      "toolbar_text": "rgb(36, 101, 139)",
      "frame": "rgb(254, 243, 241)",
      "tab_background_text": "rgb(36, 101, 139)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(36, 101, 139)",
      "tab_line": "rgb(248, 112, 140)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(32, 53, 64)",
      "tab_loading": "rgb(248, 112, 140)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c3b55a28-a17e-44ed-a846-616beb964480}"
    }
  }
}