Examine source code of Spring_Arrives

{
  "name": "Spring_Arrives",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(244, 247, 242, 1)",
      "tab_background_text": "rgba(2, 107, 7, 1)",
      "toolbar": "rgba(247, 250, 245, 0)",
      "bookmark_text": "rgba(2, 107, 7, 1)",
      "toolbar_field": "rgba(247, 250, 245, 0.09)",
      "toolbar_field_text": "rgba(2, 107, 7, 1)",
      "tab_line": "rgba(2, 107, 7, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e2717a94-6e4b-4c13-bd10-20ca10c1bad8}"
    }
  }
}