Examine source code of Scyther

{
  "name": "Scyther",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "scyther-cropped-110p.png"
    },
    "colors": {
      "frame": "rgba(22, 44, 94, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(56, 161, 35, 0.29)",
      "tab_line": "rgba(20, 107, 2, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ad489c45-9b29-4f61-b6ff-00e94bab53bb}"
    }
  }
}