Examine source code of Unbreakable Bond

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#135f69",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Unbreakable Bond",
  "manifest_version": 2,
  "description": "Nanase Haruka and Tachibana Makoto from Free!\n(C) Ouji Kouji-Kyoto Animation/Iwatobi Swimming Club\nIllustration by Utsumi Hiroko."
}