Examine source code of joslen

{
  "theme": {
    "images": {
      "theme_frame": "Header.jpg"
    },
    "colors": {
      "frame": "#1d72b3",
      "tab_background_text": "#476dba"
    }
  },
  "version": "2.0",
  "name": "joslen",
  "manifest_version": 2,
  "description": "joslen"
}