Examine source code of Pusheens

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#fce1ea",
      "tab_background_text": "#b5a89a"
    }
  },
  "version": "2.0",
  "name": "Pusheens",
  "manifest_version": 2,
  "description": "(^・ω・^ )   nya\n\n\n(all art belongs to pusheen or everyday-cute. or yknow, both)"
}