Examine source code of Light up your world

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#ffe4db",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Light up your world",
  "manifest_version": 2,
  "description": "A cute simpe theme with an anime character\n\nRender by Maoyuu-maou (<a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/36b6938fa230d334e53f063b256921088e0e149f776c578eb2380ae926221e31/http%3A//maoyuu-maou.deviantart.com/\">http://maoyuu-maou.deviantart.com/</a>) \nOriginal artwork by ello-chan for PFT (Pixtiv Fantasia T) (<a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/8bbcc700fc93282ea94a31b50a67962cab2fd506244426ac67b48cc167e2f3b5/http%3A//www.pixiv.net/member_illust.php%3Fid=6285359&amp;type=all&amp;p=2\">http://www.pixiv.net/member_illust.php?id=6285359&amp;type=all&amp;p=2</a>)"
}