Examine source code of KickOff - Axeso5

{
  "theme": {
    "images": {
      "theme_frame": "Axeso5-KickOffFinal.png"
    },
    "colors": {
      "frame": "#4a9c0f",
      "tab_background_text": "#094f04"
    }
  },
  "version": "2.0",
  "name": "KickOff - Axeso5",
  "manifest_version": 2,
  "description": "KickOff - Axeso5 Oficial! \nLatin KickOff For Firefox"
}