Examine source code of Tor Browser Theme

{
  "name": "Tor Browser Theme",
  "manifest_version": 2,
  "version": "5.0",
  "theme": {
    "images": {
      "theme_frame": "TorLogo_for_firefox_theme_7.png"
    },
    "colors": {
      "frame": "rgba(207, 16, 16, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(128, 0, 0, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(0, 0, 0, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)"
    }
  }
}