Examine source code of decor verde

{
  "name": "decor verde",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "decor...png"
    },
    "colors": {
      "frame": "rgba(4, 43, 25, 1)",
      "tab_background_text": "rgba(250, 250, 250, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(250, 250, 250, 1)",
      "toolbar_field": "rgba(252, 252, 252, 0)",
      "toolbar_field_text": "rgba(250, 250, 250, 1)",
      "tab_line": "rgba(250, 250, 250, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0c44329f-b09c-4a0d-94a8-f09746199766}"
    }
  }
}