Examine source code of xenocide

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "xenocide",
  "manifest_version": 2,
  "description": "$i = me;\n\nif ( $i == me ) {\n\techo \"The if statement evaluated to SELF\";\n} else {\n\techo \"The if statement evaluated to ELSE\";\n}"
}