Examine source code of SF9 Forever9

{
  "name": "SF9 Forever9",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "sf9 forever9.png"
    },
    "colors": {
      "frame": "rgba(235, 138, 18, 1)",
      "tab_background_text": "rgba(240, 81, 24, 1)",
      "toolbar": "rgba(245, 154, 27, 1)",
      "bookmark_text": "rgba(242, 75, 24, 1)",
      "toolbar_field": "rgba(240, 140, 19, 1)",
      "toolbar_field_text": "rgba(245, 53, 19, 1)",
      "tab_line": "rgba(242, 93, 29, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{56e5b5ac-2c01-40fe-b928-3a6e1d7e2e31}"
    }
  }
}