Examine source code of Sir Charles

{
  "name": "Sir Charles",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "SirCharles(1).png"
    },
    "colors": {
      "frame": "rgba(95, 37, 159, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(255, 105, 0, 1)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(239, 51, 64, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{bdacf173-9eda-4789-9fa5-f6e2fc5e7130}"
    }
  }
}