Examine source code of Team Kalos

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Team Kalos",
  "manifest_version": 2,
  "description": "Enjoy all three Kalos starters on your Firefox!\nWith thanks to the official Pokemon page on FaceBook for the pictures they posted."
}