Examine source code of Mare and Colt

{
  "name": "Mare and Colt",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "MareandColtHcopy.jpg"
    },
    "colors": {
      "frame": "rgba(176, 199, 252, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(178, 199, 255, 0)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(178, 199, 255, 0.07)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c87a72b2-bc37-4f5f-b8d7-116cba35bc50}"
    }
  }
}