Examine source code of Blues by M♥Donna

{
  "name": "Blues by M♥Donna",
  "manifest_version": 2,
  "version": "2.1resigned1",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(237, 223, 237, 0)",
      "tab_background_text": "rgba(3, 11, 82, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(5, 29, 82, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0abdc028-c652-4f75-88b6-c6c0aa672907}"
    }
  }
}