Examine source code of Landscape by M♥Donna

{
  "name": "Landscape by M♥Donna",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "landscapeT.jpg"
    },
    "colors": {
      "frame": "rgba(91, 107, 115, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(90, 107, 115, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(90, 106, 115, 0.07)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5270a344-81fc-4c3b-b9b4-f79f2f06f96e}"
    }
  }
}