Examine source code of ISF-Environment

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#192fd1",
      "tab_background_text": "#26bd81"
    }
  },
  "version": "2.0",
  "name": "ISF-Environment",
  "manifest_version": 2,
  "description": "The beautiful scenery in this ISF approved design inspires to preserve the environment."
}