Examine source code of When spring breaks

{
  "name": "When spring breaks",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "spring-345.png"
    },
    "colors": {
      "frame": "rgba(194, 191, 15, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(198, 214, 128, 0.61)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(197, 214, 98, 1)",
      "toolbar_field_text": "rgba(3, 3, 3, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{bea94e5c-53c5-46ec-badf-bde8aef2ae7c}"
    }
  }
}