Examine source code of Sniper rifles inverted

{
  "theme": {
    "images": {
      "theme_frame": "Sniperbackgroundinverted.JPG"
    },
    "colors": {
      "frame": "#a10f0f",
      "tab_background_text": "#912020"
    }
  },
  "version": "2.0",
  "name": "Sniper rifles inverted",
  "manifest_version": 2,
  "description": "A selection of sniper rifles, in invert colours"
}