Examine source code of decor

{
  "name": "decor",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "decor.png"
    },
    "colors": {
      "frame": "rgba(255, 255, 255, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(236, 231, 245, 0.45)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(236, 231, 245, 0.45)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{61aa56d7-d078-4c4a-a71d-a6ef16b36630}"
    }
  }
}