Examine source code of RedBerry2

{
  "theme": {
    "images": {
      "theme_frame": "redberry2.jpg"
    },
    "colors": {
      "frame": "#3b3838",
      "tab_background_text": "#050505"
    }
  },
  "version": "2.0",
  "name": "RedBerry2",
  "manifest_version": 2,
  "description": "Fun with red berry motifs.  RedBerry and RedBerry2 is the same motif but one is full color and the other is just red and white."
}