Examine source code of Chrome for Firefox

{
  "name": "Chrome for Firefox",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "chrome.png"
    },
    "colors": {
      "frame": "rgba(32, 33, 36, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(53, 54, 58, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(32, 33, 36, 1)",
      "toolbar_field_text": "rgba(145, 145, 145, 0)",
      "tab_line": "rgba(255, 255, 255, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d758973c-1c6b-4279-be88-138105da59cc}"
    }
  }
}