Examine source code of silence forest

{
  "theme": {
    "images": {
      "theme_frame": "moment-of-silence.jpg"
    },
    "colors": {
      "frame": "#ed7474",
      "tab_background_text": "#f20e0e"
    }
  },
  "version": "2.0",
  "name": "silence forest",
  "manifest_version": 2,
  "description": "silence forest"
}