Examine source code of Spring Fresh

{
  "name": "Spring  Fresh",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "springfreshH.jpg"
    },
    "colors": {
      "frame": "rgba(213, 240, 122, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(212, 240, 120, 0.09)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(255, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9720b259-fe25-4c4d-84cd-52b3c41a749b}"
    }
  }
}