Examine source code of spring wallpaper by HM

{
  "name": "spring wallpaper by HM",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "spring wallpaper by HM.jpg"
    },
    "colors": {
      "frame": "rgba(247, 242, 242, 1)",
      "tab_background_text": "rgba(71, 56, 56, 1)",
      "bookmark_text": "rgba(158, 104, 104, 1)",
      "toolbar_field": "rgba(247, 217, 217, 1)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(240, 235, 235, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{eceafd25-e62a-45bf-a6ca-1bdd5a67006f}"
    }
  }
}