Examine source code of Wolf by M♥Donna

{
  "name": "Wolf by M♥Donna",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(232, 232, 232, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(240, 240, 240, 0)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(240, 240, 240, 0.07)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(13, 12, 12, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{94182378-da2d-4c40-b72b-58b31f2c1d3b}"
    }
  }
}