Examine source code of Pokemon generations

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Pokemon generations",
  "manifest_version": 2,
  "description": "Original theme by wolfmii, I just moved it up:\n<a href=\"https://addons.mozilla.org/en-US/firefox/addon/pokemon-startersss/\" rel=\"nofollow\">https://addons.mozilla.org/en-US/firefox/addon/pokemon-startersss/</a>"
}